Overwhelming evidence concerning climate change. Addressing engineers at a recent symposium in Toronto, Canada, Dr. Ron G. Prinn, Professor of Atmospheric Science at the USA’s Massachusetts Institute of Technology (MIT), spoke of the urgency of global warming. He stated that if the northern tundra’s permafrost were to melt away, more than 80 times the current annual methane output would be released into the atmosphere, and that a four-degree Celsius rise in world-wide temperatures would mean a five-meter rise in ocean levels. Our appreciation, Dr. Prinn, for sharing this information about the dire state of our planet. May your noble work inspire others toward acting now to restore the balance of our biosphere.