Did you know that 2014 was the hottest year ever recorded in the entire history of the world? Probably you did because it’s been all over the papers. Not only that but President Obama slipped it into his State of the Union address and the president of the World Bank quoted it at Davos and the singer and rap producer Pharrell Williams is so concerned that he plans to stage a series of Live Earth concerts with Al Gore to emphasise the seriousness of the problem.