Climate Change a Threat to Security, Food and Humankind, IPCC Report Says

A United Nations report raised the threat of climate change to a whole new level on Monday, warning of sweeping consequences to life and livelihood.

The report from the UN's intergovernmental panel on climate change concluded that climate change was already having effects in real time – melting sea ice and thawing permafrost in the Arctic, killing off coral reefs in the oceans, and leading to heat waves, heavy rains and mega-disasters.