In California, a program limits greenhouse gas emissions and lets companies buy credits for environmentally beneficial projects. A recent study warns that using a one-size-fits-all approach to estimate forest carbon levels can lead to projects getting too much credit for carbon benefits, which could undermine efforts to fight climate change. It's crucial to make sure these projects are truly adding to carbon reduction efforts. The study is urging policymakers to pay close attention to the latest scientific insights to make sure climate policies are effective and timely.