Guardian: I became UK energy and climate change secretary in February 2012 that makes me the longest serving minister with this portfolio for 25 years. In this time, I have learned one lesson above all else: you can only make real progress on climate change with political leadership and trust between all parties. Thats why the new joint climate change agreement between the leaders of the three major British political parties Conservatives, Labour and Liberal Democrats is so important.
This cross-party...