Corporations are turning to forest credits in the race to go 'carbon-neutral.' Advocates worry about 'greenwashing.'
In the forests of Guatemala, China and Scotland, oil giant Royal Dutch Shell is planting tens of thousands of trees that suck greenhouse gases out of the air, allowing customers who buy its fuel to claim that their driving is carbon-neutral — at least on paper.
In Brazil, Amazon is paying to help small-scale farmers restore degraded lands in the tropical rainforest that shares its name.