I also went to this talk which was supposed to be about nanotechnology, guy was going on about climate change, extinction, the threat of overpopulation. According to him, no matter what we do to conserve energy like take up solar power etc. it won't matter because of over population. The guy's an idiot, no knowledge of foreign policy, the UN seems to make a habit these days of recruiting idiots. The thing is though, why is there such a lack of knowledge & education among scholars? The role of a scholar seems to be shifting too. I question how many genuine thinkers are there in the world today that aren't just self deluded. No wonder students are disenfranchised, angry and so forth.