This reminds me of something Richard Feynman said, I can't remember exactly so I will have to paraphrase. Politicians and even the general public come to engineers and scientists for answers to the world's problems like world hunger.

But as he pointed out, we already have the technologies to feed, house and provide the other basics for every person on Earth. And we have for over a century. These aren't scientific or engineering problems. We're just not using solutions we already have because we don't like them. These are political problems and cannot and will not be solved with a magic technological bullet. (Though more technologies might make it easier to solve if and when we decide politically to do so.)