A new map shows where carbon needs to stay in nature to avoid climate disaster
Releasing the carbon stored in vulnerable ecosystems could push global warming past 1.5 degrees Celsius
Old-growth forests, like this stand of redwood trees in California, store a lot of climate-warming carbon that would be lost to the atmosphere if the trees were cut down. The temperate rainforests of the Pacific Northwest contain 5 gigatons of such carbon, according to a new study.