U.N. Secretary-General says time is running out for world leaders to lead . Report is `` another canary in the coal mine , '' U.S. Secretary of State John Kerry says . The report comes as a new round of talks between Iran and six major powers over its nuclear program are set to begin Monday at Geneva. The Weather Channel 's statement says that the Earth is indeed warming and cites `` strong evidence that the majority of the warming over the past century is a result of human activities . '' IPCC says it is more certain than ever that humans are causing temperature rises .
U.N. Secretary-General says time is running out for world leaders to lead . Report is `` another canary in the coal mine , '' U.S. Secretary of State John Kerry says . The report comes as a new round of talks between Iran and six major powers over its nuclear program are set to begin Monday at Geneva. IPCC says it is more certain than ever that humans are causing temperature rises .