much they be emitting carbon. so in 2009 in copenhagen, 25 countries agreed upon these measures. and in my mind what now remains to be done is to get the details sorted. i hope that in 2015, which is what everyone is now aiming at, that there will be a legally binding agreement among nations. i also do feel that the u.n. process which is asking countries to limit carbon would also think about asking countries to invest a certain amount of money. renewable energies as much as asking people to cap carbon. they would ask countries to also invest in renewable energy. >> renewable energy? part of your effort also is, of course, to get the world's attention. the island president, the document trilt is clearly going to do that. it is getting a lot of attention. you were on david letterman the other day. let's watch a little bit of that interview.