The List

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Rank / Company / environmental impact score / Green policies score / Reputation Survey score / Green Score

1. Dell 81.49 100.00 84.33 100.00

Dell has built its sustainability strategy over the years by setting a series of ambitious goals. In 2008 it said it would reduce its total emissions by 40 percent by 2015, and it is on target to meet its commitment. Many of Dell's efforts are focused on reducing the environmental footprint of its products, from design to disposal. The company also has one of the tech industry's most comprehensive recycling programs.

2. Hewlett-Packard 90.60 94.09 95.35 99.32

Long a leader in environmental issues, HP has strong programs to reduce greenhouse-gas emissions and use renewable energy. In 2008 it began reporting emissions associated with its supply chain. It is also working to reduce the energy use of its products: if all HP printers, PCs, and servers shipped in 2005 were replaced with new HP models, customers would save $10.4 billion in the first year.

3. IBM 98.71 89.52 98.42 99.20

The global tech manufacturer has worked hard to make its own operations more efficient. Between 1990 and 2000, IBM figured out how to reduce its energy use by 5.1 billion kilowatt hours--enough to power a midsize town. Now it's using that knowledge to create products like the Sustainability

Management System, which helps clients operate commercial buildings more efficiently.

4. Johnson & Johnson 74.95 98.86 80.34 99.02

Johnson & Johnson is a leader among pharmaceutical companies for its progressive climate-change policies. It had vowed to reduce by 7 percent its baseline CO2 emissions by 2010--and surpassed its goal with a 16 percent reduction. The company has also set--and exceeded--ambitious goals for reducing waste, packaging, and energy use. Solar panels provide 70 percent of the electricity at its Titusville, N.J., facility.

5. Intel 95.74 88.79 92.71 97.57

The big chipmaker believes that reducing its environmental footprint is everybody's business. The company links the year-end bonuses of all employees to several companywide sustainability goals. Intel is also committed to reducing waste and is working hard to find suitable alternatives for the toxic components in its products. Nearly half of its U.S. energy comes from renewable sources.

6. Sprint Nextel 99.70 94.58 44.72 94.98

It was the first U.S.-based wireless provider to announce a target for reducing greenhouse-gas emissions. Sprint says it will cut emissions by 15 percent between 2007 and 2017 by improving energy efficiency within its networks. The company also has a strong recycling program: customers can turn in old phones, batteries, and accessories, regardless of brand. Sprint even pays for postage.

7. Adobe Systems 89.61 88.08 72.57 94.15

The company focuses on greening its office buildings and reducing waste. Adobe currently has four buildings that are LEED-certified at the platinum level, making it a world leader. Employees at its San Jose headquarters actively recycle and compost, diverting up to 97 percent of the site's solid waste from landfills. Adobe has been redesigning software packaging to reduce its environmental impact.

8. Applied Materials 91.98 87.33 60.06 92.67

It is the world's largest equipment supplier to the solar-photovoltaic industry, and the company is developing technologies that could help reduce the need to burn fossil fuels. It made great strides last year in reducing its own CO2 emissions and water use, cutting them by 21 percent and 18 percent, respectively. It is also reducing the hazardous waste it generates during manufacturing.

9. Yahoo 68.62 89.07 59.74 92.67

The Internet giant encourages its 600 million worldwide users to be environmentally aware. Its Yahoo Green site is the top destination on the Internet for green lifestyle tips. …