"Why Carbon Credits For Forest Preservation May Be Worse Than Nothing"
"RIO BRANCO, Brazil — The state of Acre, on the western edge of Brazil, is so remote, there’s a national joke that it doesn’t exist. But for geochemist Foster Brown, it’s the center of the universe, a place that could help save the world.
“This is an example of hope,” he said, as we stood behind his office at the Federal University of Acre, a tropical campus carved into the Amazon rainforest. Brown placed his hand on a spindly trunk, ordering me to follow his lead. “There is a flow of water going up that stem, and there is a flow of sap coming down, and when it comes down it has carbon compounds,” he said. “Do you feel that?”
I couldn’t feel a thing. But that invisible process holds the key to a massive flow of cash into Brazil and an equally pivotal opportunity for countries trying to head off climate change without throwing their economies into turmoil. If the carbon in these trees could be quantified, then Acre could sell credits to polluters emitting clouds of CO₂. Whatever they release theoretically would be offset, or canceled out, by the rainforest.
... In case after case, I found that carbon credits hadn’t offset the amount of pollution they were supposed to, or they had brought gains that were quickly reversed or that couldn’t be accurately measured to begin with. Ultimately, the polluters got a guilt-free pass to keep emitting CO₂, but the forest preservation that was supposed to balance the ledger either never came or didn’t last."
