this technology is much safer. but fourth generation reactors, like the integral fast reactors, can use the waste from the first three generations as fuel. the great philanthropist bill gates has put money and time into a traveling wave reactor that you basically stick in the ground and it goes through its body of fuel over a period of 60 years. you don't need to refuel it. there's a thorium reactor the same group is working on. other fourth generation coming along with small module reactors. they look exactly like the kind of local power source that environmentalists have increasingly been saying we should have. so there's a renaissance in reactor design, that those are just the first glimpses of. >> for some people who perhaps