zach colman covers energy for politico. what has been impact on candidate running solely on the environmental issue? >> he's made everybody aggressive, he was out on the debate stage challenging joe biden and that got biden flustered. joe biden has had to come out with a detailed plan because and so many people were asking people for more details. jay put out several huge white papers on what he wants to do on climate change and every little aspect showing that it touchestl every part of life and economy and everybody has had to measure up to that. >> what are some of the details that joe biden has put out? >> joe biden has called out zero carbon emissions in 2020, some have called for earlier, he has left open role for, you know, net zero carbon emissions, carbon capture which is when you take -- allow gas, then you track the emission to make sure they don't affect the clie mitt and store it underground. he's called for 500,000 more electric vehicle charging stations which would help, vehicle charger. he's tried to bring s