Part of the issue with catastrophic climate change is that, by some measures, an incredible amount of damage is already done. Even if all the coal-fired power plants were magically turned into wind and solar overnight, and all our cars were electric, all the greenhouse gases that we pumped into our atmosphere for 200 years would still be there. Trees could, theoretically, help fix that. As they grow, they absorb carbon dioxide from the atmosphere and, long story short, turn it into wood. But ...

Part of the issue with catastrophic climate change is that, by some measures, an incredible amount of damage is already done. Even if all the coal-fired power plants were magically turned into wind and solar overnight, and all our cars were electric, all the greenhouse gases that we pumped into our atmosphere for 200 years would still be there. Trees could, theoretically, help fix that. As they grow, they absorb carbon dioxide from the atmosphere and, long story short, turn it into wood. But ...