claim: "Rapid loss of ice-mass from the glaciers of Greenland and Antarctica are  cited as proof positive of global warming's onslaught.
evidence: For increases in global average temperature exceeding 1.5 to 2.5 °C (relative to global temperatures over the years 1980–1999) and in concomitant atmospheric CO 2 concentrations, projected changes in ecosystems will have predominantly negative consequences for biodiversity and ecosystems goods and services, e.g., water and food supply.