"Some parts of nature and human society are more vulnerable than expected to climate change, according to a draft of a U.N. report that adds a new purple color to a key diagram to show worsening risks beyond the red used so far."

"It says "unique and threatened systems" like coral reefs, endangered animals and plants, Arctic indigenous communities, tropical glaciers or small island states seem be less able to adapt to warming than believed in a last report in 2007.

The 44-page draft Summary for Policymakers by the Intergovernmental Panel on Climate Change (IPCC) looking at impacts of climate change worldwide, obtained by Reuters and dated March 2013, is part of a series of IPCC reports updating science from 2007 as the main guide for governments."

Alister Doyle reports for Reuters September 16, 2013. [2]