Vox: These are 8 of the most high-impact, cost-effective, evidence-based organizations. “You may not have heard of them….The groups I list below seem to be doing something especially promising in the light of certain criteria: importance, tractability, and neglectedness. Important targets for change are ones that drive a big portion of global emissions. Tractable problems are ones where we can actually make progress right now. And neglected problems are ones that aren’t already getting a big influx of cash from other sources like the government or philanthropy, and could really use money from smaller donors…”