We managed to grab Gregory Benford, one of the speakers at the Skeptic's Conference, over dinner on Saturday. You can listen to the 7-minute podcast here.
You'll hear his explanation of UVB-Chaff – a proposed solution to warming on our planet (also a way to prevent lots of skin cancer). This is likely to generate some ideological controversy, as those who believe we should leave Mother Nature alone take issue with those who believe we have a responsibility to use technology to solve our problems. Check it out and we'd love to hear your thoughts!