us withrters to help questions. we have the national energy environment reporter for the associated press and an environmental reporter for the national journal. >> on friday the intergovernmental panel on climate change came out with its newest report on the state of climate science. said they have maybe five percent certainty that human activities are contributing to global warming. they focused on this 15 year globaln the rate of warning which is something that has got a lots of attention from skepticism -- skeptics. i him into this -- interested in your take on the report, what it means for u.s. >> it is a watershed. the statement about the extreme opulence of scientists in terms of not only warming but the human role is very clear. it also underpins of the importance of the president climate action plan. i might note that the action plan has a very strong emphasis on mitigating the risks of climate change. perhaps we will talk about some of the things the department of energy is responsible for. we also have to