If you’re reading this, chances are you care a lot about fighting climate change , and that’s great. The climate emergency threatens all of humanity. And although the world has started to make some progress on it, our global response is still extremely lacking. The trouble is, it can be genuinely hard to figure out how to direct your money wisely if you want to reduce greenhouse gas emissions. There’s a glut of environmental organizations out there — but how do you know which are the most impactful? To help, here’s a list of eight of the most high-impact, cost-effective, and evidence-based organizations. We’re not including bigger-name groups, such as the Environmental Defense Fund, the Nature Conservancy, or the Natural Resources Defense Council, because most big organizations are already relatively well-funded. The groups we list below seem to be doing something especially promising in the light of criteria that matter for effectiveness: importance, tractability, and neglectedness.…