Warming for decades above 1.5 degrees Celsius -- the temperature guardrail of the Paris climate deal -- will have "irreversible impacts to human and ecological systems", according to a draft UN report obtained exclusively by AFP. The Intergovernmental Panel on Climate Change report, a 4,000-page assessment of climate impacts, warns of the dire consequences facing humanity if it fails to rein in carbon emissions. "Life on Earth can recover from a drastic climate shift by evolving into new species and creating new ecosystems," a draft summary says. "Humans cannot." pg-mh-klm/jv