Independent: Scientists are to tell the international community that they are at least 95 per cent sure that human activity is the main cause of climate change, according to one of the most authoritative reports on the subject. The UN's Intergovernmental Panel on Climate Change (IPCC) will say next week that certainty has increased from "very likely" to "extremely likely" that human activity has caused more than half of the observed temperature rise from 1951 to 2010, in a large part due to fossil fuels and...