david aten borrow. attenboro. attenborough. >> to gather energy from nonpolluting sources, that is to say the sun. at a blow, you simply stop carbon being polluting by leaving the coal and the oil in the ground. another prize to nations of all kinds, developed, undeveloped, everyone. >> zero carbon is an issue of course and possibly getting into the text by 2050. do you feel it's realistic? >> i think global apollo project is totally realistic. the suggest is that if you have the coordinated scientific brains of the world to work out a road map to see what the problems are, to divide up the problems, and work them, to do that within ten years, if you could put a plan on the moon within ten years the world's scientists ought to be able to solve these problems. you know only 1/5,000 support of the energy that comes from the sun every day if you actually would harness that you would provide the whole of humanity with all the power it needs. i don't believe that's beyond human possibility. >> that's absolutely extraordinary, isn't it? now you in your lifetime for a lifetime have traveled world, you've

there are people like david attenborou attenborough. >> politicians talk about enforcement.e says make it cost equivalent. then there's a profit incentive. that will take care of compliance with any of the standards. a different take, probably the one that gets you where you want to be. >> it was also fascinating on how to hear how he cajoled his 28 friends who didn't seem like they needed convincing. thank you both. >>> and donald trump, despite widespread criticism of his claim, that he saw muslims in the u.s. celebrating on september 11th. despite the lack of evidence, how will this play out as the iowa caucuses draw closer? we have unless, next. i have asthma... ...one of many pieces in my life. so when my asthma symptoms kept coming back on my long-term control medicine, i talked to my doctor and found a missing piece in my asthma treatment. once-daily breo prevents asthma symptoms. breo is for adults with asthma not well controlled on a long-term asthma control medicine, like an inhaled corticosteroid. breo won't replace a rescue inhaler for sudden breathing problems.