Going green is the new black for big business. But how real is the climate-friendly revolution that's being advertised? Toyota would like us to think that Mother Nature drives a Prius, Ford wants us to "Join the Green Revolution," and McDonald's has painted its golden arches green. Facebook has even "friended" Greenpeace. All across the globe big corporations are spending big bucks trying to convince us that their policies, actions, and products are earth friendly. But are big brands and the celebrities endorsing them really as green as they claim?

In The Greenwash Effect, Guy...