Global warming may be a big issue to people who love polar bears and whatnot, but I think mankind has much bigger problems ahead.
What's going to happen in a few hundred years when automation costs less than slave labor? 90% of jobs automated = 90% unemployment? That'll create an enormous welfare state. The only people left that can't be replaced will be researchers, engineers, politicians, lawyers, police, military officers, and artists.
I guess by developing CNC technology, I'm contributing to the problem the way Exxon contributes to the global warming problem. Sweet.
