 About the sustainability of the environment, the most extreme think that the population should be one-tenth of what it is now. They don't volunteer to be part of the 90% that sort of make their way out of the living population. But again, just simply exposing their hypocrisy that they think the rest of us should simply die off and not have kids. That's a recipe for deep, deep trouble. In the future, we're going to have paddle boats and chargeable boat batteries.