It seems like you can't turn around these days without seeing a billboard or hearing a commercial touting some big corporation's latest green initiative.

Nestlé is getting into the fair-trade coffee business with its new Nescafé Partners Blend brand of instant coffee. BP boasts about its commitment to renewable energy with the new slogan "Beyond Petroleum." Even Wal-Mart, which has been criticized for its ethically suspect labor practices, is trying to go green. The company recently invited former Vice President Al Gore to speak about global warming and has pledged to bring organic food to the masses.

It seems like you can’t turn around these days without seeing a billboard or hearing a commercial touting some big corporation’s latest green initiative. Nestlé is getting into the fair-trade coffee business with its new Nescafé Partners Blend brand of instant coffee. BP boasts about its commitment to renewable energy with the new slogan “Beyond Petroleum.” Even Wal-Mart, which has been criticized for its ethically suspect labor practices, is trying to go green. The company recently invited former Vice President Al Gore to speak about global warming and has pledged to bring organic food to the masses.