10 green giants

These companies have gone beyond what the law requires to operate in an environmentally responsible way.

Alcan
Alcan has reduced greenhouse gas emissions from its aluminum smelting plants by 25 percent since 1990, while increasing production.
Alcan
Location: Canada
Year founded: 1902
Revenue: $23.6 Billion
Employees: 68,000
Investing in clean, efficient manufacturing

When Alcan took over French rival Pechiney in late 2003, the Montreal-based aluminum maker also landed world-class smelting technology. Because of Pechiney's proprietary methods (and an aggressive push by Alcan to track emissions), the company has been able to reduce its greenhouse-gas output by 25 percent since 1990, while production increased 40 percent. Alcan's latest goal is to install a high-capacity process that increases energy efficiency by as much as 20 percent and lowers emissions. A pilot plant in Quebec is already under construction. "It's inherent to the engineering culture to respond to problems like these," says Alcan's Corey Copeland. "It's what makes engineers tick." --Jia Lynn Yang

Honda

Continental

Suncor

Tesco

Alcan

PG&E

S.C. Johnson

Goldman Sachs

Swiss Re

H-P
Sources: Department of Energy; Eia; Ceres; Aron Cramer; Business for Social Responsibility; Dan Esty; Jonathan Lash, World Resources Institute; Matthew Kiernan, Innovest Strategic Value Advisors; Fred Krupp, Environmental Defense; Joel Makower, Greener World Media; Kld Research; Natural Resources Defense Council; Glen Pricket, Conservation International; Andrew Savitz
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