"Climate change is not the biggest threat to the lives and livelihoods of people in poor countries, and it won’t be in the future," Gates wrote in an essay published Tuesday titled “Three Tough Truth...

Bill Gates is calling on world leaders gathering at an annual climate summit next month to rethink progress through the lens of human development.

He points to a few examples where the well-intentioned pursuit of emissions cuts in developing countries led to negative consequences for health and well-being: Banning synthetic fertilizers pushed u...