A new United Nation's climate report predicts Africa's rare glaciers will disappear in the next 20 years.The report, called State of the Climate in Africa, was released Tuesday by the U.N.'s World Meteorological Organization (WMO) and other agencies.It warns that climate change will be the cause of the disappearing glaciers in eastern Africa.The report warns that the shrinking glaciers at Mount Kilimanjaro in Tanzania, Kenya's Mount Kenya and the Rwenzori Mountains in Uganda are signs of widespread climate change to come.If the current shrinking rate continues, "it will lead to total deglaciation by the 2040s," the report says.The report notes that last year was Africa's third warmest on record.Data shows temperatures on the continent were 0.86 degrees Celsius higher than the average in the 30 years leading up to 2010.