Poor nations will continue to do whatever is most economically expedient to them. Does that mean burning down the rainforest? Overfishing oceans? Or any number

Poor nations will continue to do whatever is most economically expedient to them. Does that mean burning down the rainforest? Overfishing oceans? Or any number of other environmentally unsustainable things? Yes, it does. People do these things to make ends meet. Make their ends meet on condition that that stop doing $BadThing, and the problems stemming from e.g. burning the rainforest will diminish. If the countries themselves aren't willing to establish these programs, let's help. Climate is a world game with all humanity on one side.