Best Clean Energy Stocks To Invest In Right Now

Foolish investors have been longtime fans of first-movers in a new space, and Clean Energy Fuels (NASDAQ: CLNE  ) has certainly been in on the ground floor in the effort to build out a national network of natural gas fueling stations. Now, the challenge for it will be to outpace some of its newer, larger�competitors.

Royal Dutch Shell (NYSE: RDS-A  ) announced recently that it will be partnering with Travel Centers of America (NYSE: TA  ) to build out a network of natural gas fueling stations at Travel Centers of America's highway rest stations across the country. In this video, Fool.com contributor Tyler Crowe takes a look at the leading companies in this natural gas station rush, and sees one company that could benefit from this competition.

Best Sliver Stocks To Watch Right Now: Terra Nitrogen Company L.P.(TNH)

Terra Nitrogen Company, L.P. engages in the production and sale of nitrogen fertilizer products for agricultural and industrial applications. The company primarily offers anhydrous ammonia and urea ammonium nitrate solutions. Its customers for fertilizer products include dealers, national farm retail chains, and distributors. Terra Nitrogen GP Inc. serves as the general partner of the company. Terra Nitrogen Company, L.P. was founded in 1991 and is based in Deerfield, Illinois. Terra Nitrogen Company, LP. operates as a subsidiary of Terra Industries Inc.

Advisors' Opinion:

• [By Robert Rapier] While the MLP space is dominated by the oil and gas sector, in last week’s article we began to explore some of the more exotic master limited partnership offerings. This week we continue our exploration of nontraditional MLPs by looking at the partnerships supplying fertilizer.
  
  Rentech (Nasdaq: RTK) has been around for more than a decade, and it has shifted strategies several times. Full disclosure: Rentech’s Chief Technology Officer Harold Wright is a former manager of mine when we were both at ConocoPhillips, and I have visited Rentech’s facility in Commerce City, Colorado.
  
  For most of Rentech’s existence, the company has sought to commercialize alternative fuels. At one time it had ambitions to build a large coal-to-liquids (CTL) plant, but federal legislation ultimately nudged it instead into the biomass-to-liquids (BTL) space. The company did build a BTL demonstration plant, but ultimately shut it down and has now refocused its efforts on becoming “one of the largest wood processing companies in the world.”
  
  During its interesting journey as a company, Rentech acquired two ammonia nitrogen fertilizer facilities, which turned out to be a profit center that funded the alternative energy research. In November 2011, Rentech spun off this fertilizer business into an MLP called Rentech Nitrogen Partners LP (NYSE: RNF).
  
  In the months leading to the spin-off, RTK’s market capitalization was about $200 million. Rentech maintained 60 percent ownership of RNF, and three months after the spin-off RTK’s market cap had risen to $400 million, while investors had bid RNF up to $1 billion. Interestingly, RTK’s share of RNF was worth more than RTK’s entire market cap, a situation that persists. The market currently values Rentech at $482 million, while the valuation of Rentech Nitrogen Partners makes RTK’s 60 percent stake in RNF worth slightly more than $600 million — another illu
• [By Alex Planes]

  Investors love stocks that consistently beat the Street without getting ahead of their fundamentals and risking a meltdown. The best stocks offer sustainable market-beating gains, with robust and improving financial metrics that support strong price growth. Does Terra Nitrogen (NYSE: TNH  ) fit the bill? Let's look at what its recent results tell us about its potential for future gains.

Best Clean Energy Stocks To Invest In Right Now: Universal Health Services Inc. (UHS)

Universal Health Services, Inc., through its subsidiaries, owns and operates acute care hospitals, behavioral health centers, surgical hospitals, ambulatory surgery centers, and radiation oncology centers. The company�s hospitals offer various services comprising general and specialty surgery, internal medicine, obstetrics, emergency room care, radiology, oncology, diagnostic care, coronary care, pediatric services, pharmacy services, and/or behavioral health services. As of February 24, 2012, it owned and/or operated 25 acute care hospitals and 198 behavioral health centers located in 36 states, Puerto Rico, and the U.S. Virgin Islands, as well as Washington, D.C. The company also operates six surgical hospitals, and surgery and radiation oncology centers located in four states and Puerto Rico. Universal Health Services, Inc. was founded in 1978 and is headquartered in King of Prussia, Pennsylvania.

Advisors' Opinion:

• [By Ben Levisohn]

  Tenets plunge has helped drag other healthcare stocks lower.�Community Health (CYH) has dropped 3.6% to $42.21,�HCA Holdings (HCA) has fallen 2.1% to $46.72 and�Universal Health Services�(UHS) is off 1% at $80.59.

• [By Asit Sharma]

  Universal Health Services (NYSE: UHS  )
  King of Prussia, Pa.-based Universal Health Services�operates acute-care hospitals and behavioral health centers in the United States and the U.S. Virgin Islands.The company books more than $7 billion in annual revenue, and has grown its quarterly earnings more than 220% over the last five years.�

Best Clean Energy Stocks To Invest In Right Now: Danaher Corp (DHR)

Danaher Corporation (Danaher) designs, manufactures and markets professional, medical, industrial and commercial products and services. The Company�� research and development, manufacturing, sales, distribution, service and administrative facilities are located in more than 50 countries. It operates in five segments: Test & Measurement; Environmental; Life Sciences & Diagnostics; Dental; and Industrial Technologies. In April 2011, the Company sold its Pacific Scientific Aerospace (PSA) business. On June 30, 2011, the Company acquired Beckman Coulter, Inc. (Beckman Coulter). In January 2012, the Company sold its Accu-Sort businesses. In February 2012, the Company sold its Kollmorgen Electro-Optical (KEO) business. During the year ended December 31, 2011, the Company acquired EskoArtwork, On February 6, 2012, L-3 Communications Holdings, Inc. acquired Kollmorgen Electro-Optical unit of the Company. In January 2013, the Company acquired Navman Wireless.

TEST & MEASUREMENT

The Company�� Test & Measurement segment is a provider of electronic measurement instruments and monitoring, management and optimization tools for communications and enterprise networks and related services. The segment�� products are used in the design, development, manufacture, installation, deployment and operation of electronics equipment and communications networks and services. Customers for these products and services include manufacturers of electronic instruments; service, installation and maintenance professionals; manufacturers who design, develop, manufacture and install network equipment, and service providers who implement, maintain and manage communications networks and services.

The Company�� business designs, manufactures, and markets a variety of compact professional test tools, thermal imaging and calibration equipment for electrical, industrial, electronic and calibration applications. These test products measure voltage, current, resistance, power quality, frequency, p! ressure, temperature and air quality. Typical users of these products include electrical engineers, electricians, electronic technicians, medical technicians, and industrial maintenance professionals. Its business also offers general purpose test products and video test, measurement and monitoring products used in electronic design, manufacturing and advanced technology development. The business��general purpose test products, including oscilloscopes, logic analyzers, signal sources and spectrum analyzers, are used to capture, display and analyze streams of electrical data. The Company sells these products into a variety of industries with electronic content, including the communications, computer, consumer electronics, education, military/aerospace and semiconductor industries.

Typical users include research and development engineers who use its general purpose test products to design, de-bug, monitor and validate the function and performance of electronic components, subassemblies and end-products. Its video test products include waveform monitors, video signal generators, compressed digital video test products and other test and measurement equipment used to enhance a viewer�� video experience. Typical users of these products include video equipment manufacturers, content developers and traditional television broadcasters. Products in this business are marketed under the FLUKE, TEKTRONIX, KEITHLEY, RAYTEK, FLUKE BIOMEDICAL, AMPROBE and MAXTEK brands.

The communications businesses offer network management solutions, handheld and fixed diagnostic equipment and security solutions, as well as related installation and maintenance services, for a range of private network applications, as well fixed and mobile communications systems. Typical users of the business��products include network engineers, installers, operators, and technicians. Its network management tools help network operators continuously manage network performance and optimize the utilization, uptime and servi! ce qualit! y of the network. Products in this business are marketed under the TEKTRONIX, FLUKE NETWORKS, ARBOR, VISUAL NETWORKS and AIRMAGNET brands.

Matco Tools manufactures and distributes professional tools, toolboxes and automotive equipment through independent mobile distributors, who sell primarily to professional mechanics under the MATCO brand. Hennessy Industries is a North American full-line wheel service equipment manufacturer, providing brake lathes, vehicle lifts, tire changers, wheel balancers, and wheel weights under the AMMCO, BADA and COATS brands. Typical users of these products are automotive tire and repair shops. Sales are generally made through its direct sales personnel, independent distributors, retailers, and original equipment manufacturers.

ENVIRONMENTAL

The Company�� Environmental segment provides products that help protect its water supply and air quality and serves two primary markets: water quality and retail/commercial petroleum. Danaher�� water quality business is engaged in water quality analysis and treatment, providing instrumentation and disinfection systems to help analyze and manage the quality of ultra pure, potable and waste water in residential, commercial, industrial and natural resource applications. Its water quality operations design, manufacture and market a range of analytical instruments, related consumables, and associated services that detect and measure chemical, physical, and microbiological parameters in ultra pure, potable and waste water as well as groundwater and ocean bodies; ultraviolet disinfection systems, which disinfect billions of gallons of municipal, industrial and consumer water every day in more than 35 countries, and industrial water treatment solutions, including chemical treatment solutions intended to address corrosion, scaling and biological growth problems in boiler, cooling water and industrial waste water applications, as well as associated analytical services. Typical users of its analytical in! struments! , ultraviolet disinfection systems, industrial water treatment solutions and related consumables and services include professionals in municipal drinking water and waste water treatment plants and industrial process water and waste water treatment facilities, third-party testing laboratories and environmental field operations. Its water quality business provides products under a variety of well-known brands, including HACH, HACH/LANGE, TROJAN TECHNOLOGIES and CHEMTREAT. Manufacturing facilities are located in North America, Europe, and Asia.

The Company has served the retail/commercial petroleum market through its Veeder-Root business. Gilbarco Veeder-Root is a provider of products and services for the retail/commercial petroleum market, including environmental monitoring and leak detection systems; vapor recovery equipment; fuel dispensers; point-of-sale and secure electronic payment technologies for retail petroleum stations; submersible turbine pumps, and remote monitoring and outsourced fuel management services, including compliance services, fuel system maintenance, and inventory planning and supply chain support. Typical users of these products include independent and Company-owned retail petroleum stations, high-volume retailers, convenience stores, and commercial vehicle fleets. The Company markets its retail/commercial petroleum products under a variety of brands, including GILBARCO, VEEDER-ROOT, and GILBARCO AUTOTANK. Manufacturing facilities are located in North America, Europe, Asia and Latin America. Sales are generally made through independent distributors and its direct sales personnel.

LIFE SCIENCES & DIAGNOSTICS

The Company�� diagnostics businesses offer a range of analytical instruments, reagents, consumables, software and services that hospitals, physician�� offices, reference laboratories and other critical care settings use to diagnose disease and make treatment decisions. Its life sciences businesses offer a range of research and clinical ! tools tha! t are used by scientists to study cells and cell components to gain a better understanding of complex biological matters. Pharmaceutical and biotechnology companies, universities, medical schools and research institutions use these tools to study the causes of disease, identify new therapies and test new drugs and vaccines. The diagnostics business consists of its core lab, acute care and pathology diagnostics businesses.

The Company�� core lab diagnostics business is a manufacturer and marketer of biomedical testing instrument systems, tests and supplies that are used to evaluate and analyze samples made up of body fluids, cells and other substances. The information generated is used to diagnose disease, monitor and guide treatment and therapy, assist in managing chronic disease and assess patient status in the hospital, outpatient and physician office settings. Its chemistry systems use electrochemical detection and chemical reactions with patient samples to detect and quantify substances of diagnostic interest in blood and other body fluids. Commonly performed tests include glucose, cholesterol, triglycerides, electrolytes, proteins and enzymes.

The Company�� immunoassay systems also detect and quantify chemical substances of diagnostic interest in body fluids, particularly in circumstances where more specialized diagnosis is required. Commonly performed immunoassay tests assess thyroid function, screen and monitor for cancer and cardiac risk and provide important information in fertility and reproductive testing. Its cellular analysis business includes hematology, flow cytometry and coagulation products. The business��hematology systems use principles of physics, optics, electronics and chemistry to separate cells of diagnostic interest and then quantify and characterize them, allowing clinicians to study formed elements in blood (such as red and white blood cells and platelets). The business also distributes coagulation products, which rely on clotting, chromogenic! and immu! nologic technologies to provide the detailed information that clinicians require to diagnose bleeding and clotting disorders and to monitor anticoagulant therapy. It also offer systems and workflow solutions that allow laboratories to automate a number of steps from the pre-analytical through post-analytical stages including sample barcoding/information tracking, centrifugation, aliquotting, storage and conveyance. These systems along with the analyzers above are controlled through laboratory level software that enables laboratory managers to monitor samples, results and lab efficiency.

The Company�� acute care diagnostics business is a provider of instruments and related consumables and services that are used in both laboratory and point-of-care environments to rapidly measure critical parameters, including blood gases, electrolytes, metabolites and cardiac markers. Typical users of these products include hospital central laboratories, intensive care units, hospital operating rooms and hospital emergency rooms. Its pathology diagnostics business is engaged in the anatomical pathology market, offering a suite of instrumentation and related consumables used across the entire workflow of a pathology laboratory. Its pathology diagnostics products include tissue embedding, processing and slicing (microtomes) instruments and related reagents and consumables; chemical and immuno-staining instruments, reagents, antibodies and consumables; slide coverslipping and slide/cassette marking instruments, and imaging instrumentation including slide scanners, microscopes, cameras and associated software. Typical users of these products include pathologists, lab managers and researchers. Its diagnostics business generally markets its products under the BECKMAN COULTER, LEICA BIOSYSTEMS, RADIOMETER and SURGIPATH brands. Manufacturing facilities are located in North America, Europe, Asia and Australia. The businesses sell to customers primarily through direct sales personnel and to a lesser extent through ! independe! nt distributors.

The Company�� microscopy business is a provider of professional microscopes designed to manipulate, preserve and capture images of, and enhance the user�� visualization of, microscopic structures. Its microscopy products include laser scanning (confocal) microscopes; compound microscopes and related equipment; surgical and other stereo microscopes; specimen preparation products for electron microscopy; and digital image capture and manipulation equipment. The Company also offers workflow instruments and consumables that help researchers analyze genomic, protein and cellular information. Key product areas include sample preparation equipment, such as centrifugation and capillary electrophoresis instrumentation and consumables; liquid handling automation instruments and associated consumables; flow cytometry instrumentation and associated antibodies and reagents; and particle characterization instrumentation. The business also offers genome profiling services. Researchers use the business��products to study biological function in the pursuit of basic research, therapeutic and diagnostic development. Typical users of these products include pharmaceutical and biotechnology companies, universities, medical schools and research institutions and in some cases industrial manufacturers.

The Company�� mass spectrometry business is a provider of high-end mass spectrometers. Mass spectrometry is a technique for identifying, analyzing and quantifying elements, chemical compounds and biological molecules, individually or in complex mixtures. Its products utilize various combinations of quadrupole, time-of-flight and ion trap technologies, and are typically used in conjunction with a third party liquid chromatography instrument. Its mass spectrometer systems are used in numerous applications, such as drug discovery and clinical development of therapeutics as well as in basic research, clinical testing, food and beverage quality testing and environmental testing. To s! upport it! s installations around the world, it provides implementation, validation, training, maintenance and support from its global services network. Typical users of its mass spectrometry products include molecular biologists, bioanalytical chemists, toxicologists, and forensic scientists, as well as quality assurance and quality control technicians. It also provides high-performance bioanalytical measurement systems, including microplate readers, automated cellular screening products and associated reagents, and imaging software. Typical users of these products include biologists and chemists engaged in research and drug discovery, who use these products to determine electrical or chemical activity in cell samples. Its life sciences business generally markets its products under the LEICA MICROSYSTEMS, BECKMAN COULTER, AB SCIEX and MOLECULAR DEVICES brands. Manufacturing facilities are located in Europe, Australia, Asia and North America.

DENTAL

The Company�� Dental segment is a provider of a range of consumables, equipment and services for the dental market, which encompasses the diagnosis, treatment and prevention of disease and ailments of the teeth, gums and supporting bone. Its dental businesses develop, manufacture and market dental consumables and dental equipment orthodontic bracket systems and lab products; impression, bonding and restorative materials; endodontic systems and related consumables; infection prevention products, and diamond and carbide rotary instruments. Typical customers and users of these products include general dentists, dental specialists, dental hygienists, dental laboratories and other oral health professionals, as well as educational, medical and governmental entities. Its dental products are marketed primarily under the KAVO, GENDEX, iCAT, INSTRUMENTARIUM DENTAL, SOREDEX, PELTON & CRANE, DEXIS, ORMCO, KERR, PENTRON, SYBRON ENDO and TOTAL CARE brands.

INDUSTRIAL TECHNOLOGIES

The Company�� Industrial Technologies segment ! designs a! nd manufactures components and systems that are typically incorporated by original equipment manufacturers (OEMs) and systems integrators for sale into a diverse set of applications and end-markets. The businesses in this segment also provide service and support, including helping customers with integration and installation and providing services to ensure performance and up-time. Danaher�� product identification business is a global provider of equipment and consumables for variable printing, marking and coding on a variety of consumer and industrial products. Its businesses design, manufacture, and market a variety of equipment used to print bar codes, date codes, lot codes, and other information on primary and secondary packaging. Its equipment can apply alphanumeric codes, logos and graphics to a range of surfaces at a variety of line speeds, angles and locations on a product or package.

EskoArtwork, the business is a service solutions provider for the digital packaging design and production market. Typical users of the product identification business��products include food and beverage manufacturers, pharmaceutical manufacturers, retailers and commercial printing and mailing operations. Its product identification products are primarily marketed under the VIDEOJET, LINX, FOBA and ESKOARTWORK brands. Manufacturing facilities are located in North America, Europe, Latin America, and Asia. The Company is a provider of electromechanical motion control solutions for the industrial automation and packaging markets. Its businesses provide a range of products including standard and custom motors; drives; controls, and mechanical components, such as ball screws, linear bearings, clutches/brakes, and linear actuators.

The products are sold in various precision motion markets, such as the markets for packaging equipment, medical equipment, robotics, circuit board assembly equipment, elevators and electric vehicles (such as lift trucks). Its motion products are marketed under a vari! ety of br! ands, including KOLLMORGEN, THOMSON, DOVER and PORTESCAP. Manufacturing facilities are located in North America, Europe, Latin America, and Asia. Its sensors and controls products include instruments that monitor, sense and control discrete manufacturing variables such as temperature, position, quantity, level, flow and time. Users of these products span a wide variety of manufacturing markets. Certain businesses included in this group also make and sell instruments, controls and monitoring systems used by the electric utility industry to monitor their transmission and distribution systems, as well as automatic identification solutions. The products are marketed under a variety of brands, including DYNAPAR, HENGSTLER, IRIS POWER, WEST, GEMS SENSORS, SETRA and QUALITROL. Sales are generally made through our direct sales personnel and independent distributors.

The Company�� defense business designs, manufactures, and markets energetic material systems. Typical users of these products include defense systems integrators and prime contractors. defense products are typically marketed under the PACIFIC SCIENTIFIC ENERGETIC MATERIALS COMPANY brand. The KEO business designs, develops, manufactures and integrates highly engineered, stabilized electro-optical/ISR systems that integrate into submarines, surface ships and ground vehicles. Jacobs Vehicle Systems (JVS) is a supplier of supplemental braking systems for commercial vehicles, selling JAKE BRAKE brand engine retarders for class 6 through 8 vehicles and bleeder and exhaust brakes for class 2 through 7 vehicles. Customers are primarily manufacturers of class 2 through class 8 vehicles, and sales are typically made through its direct sales personnel. Manufacturing facilities of its sensors and controls, defense and JVS businesses are located in North America, Latin America, Europe and Asia.

Advisors' Opinion:

• [By Lee Samaha]

  Investors in Danaher� (NYSE: DHR  ) saw the company deliver a disappointing set of second-quarter results that caused the stock to drop notably. In fact, as of today, it's pretty much flat on a six-month basis. In truth, the results weren't that bad: The midpoint of full-year generally accepted accounting principles earnings per share guidance was actually raised by a couple cents as management narrowed its guidance to $3.67-$3.72 from $3.60-$3.75.

• [By Monica Gerson]

  Danaher (NYSE: DHR) is estimated to report its Q2 earnings at $0.96 per share.

  Alliance Data Systems (NYSE: ADS) is expected to report its Q1 earnings at $2.72 per share on revenue of $1.26 billion.

• [By Lee Samaha]

  There is no doubt that Danaher Corporation (NYSE: DHR  ) is one of the highest-quality names in the industrial sector, but with the stock underperforming the S&P 500 by around 7.7% year to date, there is a sense that the market is losing a little patience with Danaher. In addition, the company is facing a significant amount of unpredictability about its future prospects -- an unusual situation for Danaher. It's time to look at three reasons Danaher could fall in 2014.

Best Clean Energy Stocks To Invest In Right Now: MicroStrategy Incorporated(MSTR)

MicroStrategy Incorporated provides enterprise software platforms for business intelligence (BI), and mobile and social intelligence applications worldwide. The company offers MicroStrategy 9, an integrated BI platform that enables businesses to make business decisions. The MicroStrategy 9 platform?s product components comprise Intelligence Server, a foundation for the BI platform; Report Services, a reporting engine delivering production and operational reports, managed metrics reports, and interactive dashboards; OLAP Services that allows Web and desktop users to manipulate Intelligent Cubes databases; Web, a Web interface providing query, reporting, and analysis; Distribution Services that offers automated report and dashboard distribution; Office, which enables Microsoft Office users to create, run, edit, and format MicroStrategy report; and Desktop that provide users access to data through analytical applications. The MicroStrategy 9 platform?s product components al so include Architect, whose data sources are modeled through an intuitive graphical user interface; SDK to integrate MicroStrategy 9 features and functionality into any application on multiple platforms; Integrity Manager to compare and verify reports? consistency; Command Manager that automates MicroStrategy administrative tasks; Enterprise Manager to provide prebuilt reports and dashboards; Object Manager that allows administrators to manage disparate and distributed environments; MultiSource Option allowing users to report, analyze, and monitor data; Transaction Services that provides write-back capabilities; and Clustering Option, a plug-and-play add-on to Intelligence Server. The company also offers technical support, consulting, education, and cloud-based solutions. It serves retail, communications, financial services, insurance, healthcare, manufacturing, technology, consumer goods, and public services industries. The company was founded in 1989 and is headquartered in Tysons Corner, Virginia.

Advisors' Opinion:

• [By John Udovich]

  Yesterday, small cap business intelligence stock MicroStrategy Incorporated (NASDAQ: MSTR) surged 18.44%�after reporting better-than-expected third quarter earnings ��meaning it might be a good idea to take a closer look at it�along with�small cap peers Actuate Corporation (NASDAQ: BIRT) and Qlik Technologies Inc (NASDAQ: QLIK) to see what they might offer small cap investors. After all, everyone is being inundated with huge amounts of data from multiple sources, but its the following small cap stocks that provide software platforms to help customers try to make sense of it all:�

• [By Evan Niu, CFA]

  What: Shares of MicroStrategy (NASDAQ: MSTR  ) have plunged today by as much as 13% after the company reported first-quarter earnings.

  So what: Revenue in the first quarter added up to $130.2 million, a 6% decline from a year ago. That translated into a loss from continuing operations of $5.2 million, or $0.46 per share. Those figures looked poor relative to consensus estimates, which were calling for $152.4 million in sales and $0.35 per share in profit.

• [By Victor Selva]

  The second place was occupied by MicroStrategy Incorporated (MSTR), a provider of business intelligence and mobile software with 5.5% of the total portfolio and worth $52.6 million. It reported significant earnings per share improvement in the most recent quarter compared to the same quarter a year ago, and the stock price outperformed the rise in the S&P 500.

• [By Tim Beyers and Erin Miller]

  Importantly, the BI sector as a whole isn't seeing gains. MicroStrategy (NASDAQ: MSTR  ) fell as much as Qlik gained on a 6% decline in revenues in the most recent quarter. Qlik, by contrast, reported a 22% rise in revenue and told analysts to expect another 20% or better bump in the quarter.