I refer you to Konstantin Kisin's speech at the Oxford Union.

You're not going to get 3rd and 2nd world nations to stop progress. Are you going to tell the rural Russian or Chinese farmers that they have to keep their hole in the ground instead of building a heated toilet?

I will quote someone most of you will probably "hate" so I won't name him. Humans suck at prevention, but we are MASTERS at adaptation. What will help solve this is to drive, to create, to work, to build and engineer solutions for the earth as a whole. So when those Indians are trying to build out of their squalid living conditions, they can do so in a much more "earth friendly" way than the current 1st world nations did.