Independent: The negative effects of climate change are already beginning to be felt in every part of the world and yet countries are ill-prepared for the potentially immense impacts on food security, water supplies and human health, a major report has concluded. In the most comprehensive study yet into the effects of rising levels of carbon dioxide in the atmosphere, the UNs Intergovernmental Panel on Climate Change (IPCC) warns that global warming could undermine economic growth and increase poverty. The...