Greenpeace: The UK government’s decision to expand Heathrow airport, announced today, is a serious threat to the fight against global climate change. At full capacity, an expanded Heathrow airport would become the biggest single source of carbon emissions in the UK. Developed countries must take steps to ensure their carbon emissions are cut by the upper end of 25-40%, by 2020, as recommended by the Intergovernmental Panel on Climate Change, in order to avoid catastrophic climate change. Already …