evidence: A claim by Britain’s leading climate science sceptic, Nigel Lawson, that the world’s average temperature has fallen in the past 10 years was based on an "erroneous" temperature chart, his think tank, the Global Warming Policy Foundation, has admitted. [...] And he then added: "As for the temperature itself, it is striking, he [Gore] made his previous film 10 years ago, and according – again – to the official figures, during this past 10 years, if anything, mean global temperature, average world temperature, has slightly declined." [...] Records kept by the UK’s Met Office, Nasa, and the US National Oceanic and Atmospheric Administration are broadly in agreement despite using different temperature stations: the average global temperature is now about one degree Celsius above levels in the late 1800s.