>>geox+(OP)
Hopefully next we can help fix mercury in fish, the number one contributor right now is burning coal. Seems like it would be a easy decision.
>>russdi+Jb
Burning coal is a huge and easy win. Artisinal and small scale gold mining should be high on the list too, even though it's a much harder problem:
>>Menger+Xp
I'm skeptical that it's easier. On the numbers alone, artisanal and small scale gold mining (apparently) accounts for 15-20% of global gold production. But coal accounts for 35% of total electricity generation.