Sign up, to pledge to cut methane emissions by 30% by 2030, it says, that 60 countries have already signed up. obviously they're hoping for a lot more, though, wolf. >> all right. thank you very much, scott mclane reporting from london. a lot going on. i'm wolf blitzer at the g20 summit. i'll be back in a few minutes at the bottom of the hour with the latest developments from here. right now want to turn it over to my colleague kim brunhuber who is joining us from atlanta. kim? >> all right, thanks so much, wolf. we're going to start with some troubling signs in the global fight against the ...