Capitalism is destroying the earth. Cuba is a wonderful country. What Castro's done is superb. In the 1970s, the world will undergo famines. Hundreds of millions of people are going to starve to death in spite of any crash programs embarked upon now.
Population control is the only answer.
The only real good technology is no technology at all. The right to have children should be a marketable commodity, bought and traded by individuals but absolutely limited by the state. To put it bluntly, many of those who are alertable to the nonsensical environmental assumptions of economic theory are alerted by now, and major efforts to inform the remaining economists about the facts of life seem unlikely to be very cost-effective. Paradigm shifts are rarely accepted by the middle-aged rank and file in any discipline, and new ideas normally take over only as older scholars retire. In the process, they can recruit the better minds among profesional economists, young and old.