A newborn baby girl named Danica Camacho, the Philippines’ symbolic “seven billionth baby” who was part of the United Nations’ seven billion global population projection, in Fabella Maternity Hospital Manila on October 31st, 2011. The UN had predicted the world’s population would reach seven billion on October 31st, 2011. Photograph: Reuters/Erik De Castro

The Intergovernmental Panel on Climate Change reports that if we fail to prevent global warming rising by more than 1.5 degrees over pre-industrial wo(...)