Take the billions were spending on energy retrofits, and put it towards family planning education in high school. Open thousands of free vasectomy clinics in developing countries. Impose a large tax on immigrants who want move to the largest cities. Try and divert population growth to smaller towns and cities, in strategic locations that would be good for the economy. Get the worlds smartest people to look into ethical solutions to deal with overpopulation. If we are going to use policy and invention, we should make sure our ideas have the lowest impact on human rights. Try and avoid using force, but respect all sides on the issue, and create a volunteer movement to affect change.I do have some sympathy for your position. But again I ask, what is your suggestion or suggestions?