http://www.guardian.co.uk/environment/2009/jan/18/jim-hansen-obama
http://www.guardian.co.uk/environment/2009/jan/18/obama-climate-change
http://www.guardian.co.uk/environment/2009/jan/18/jim-hansen-obama
http://www.guardian.co.uk/environment/2009/jan/18/obama-climate-change