with  Kathy Sykes , examined global warming ahead of the  2009 United Nations Climate Change Conference  in Copenhagen. [19] How the Earth Made Us  (2010),  ASIN : B002SZQCA2 (Blueray), U.S. title:  How the Earth Changed History , ASIN: B003DC8824, [20] five one-hour films on how  geology ,  geography  and  climate  have