Givewell decided to make this recommendation despite ongoing disputes in the literature. There was so much uncertainty about the long-term effects that at leas

Givewell decided to make this recommendation despite ongoing disputes in the literature. There was so much uncertainty about the long-term effects that at least as of 2016, they actually discounted the expected benefit by 100x. See https://blog.givewell.org/2016/12/06/why-i-mostly-believe-in-worms/ https://blog.givewell.org/2016/12/06/why-i-mostly-believe-in...