Perils of global climate change

July and the first six months of this year are the hottest since records have been kept. Carbon dioxide in the atmosphere is climbing through 300 parts per million. And there is ample evidence of a calamitous extinction of species worldwide. The acidification of the oceans due to CO2 absorption can radically affect the world’s food supply by 2070.

The climate will include a greater frequency of extreme weather events. The extraordinary snow events in New England are a direct result of accelerating melting of ice on Greenland. Sea level rise may be as much as 10 feet in the next 50 years. Think...