Commentary This month, climate change celebrates its 33rd birthday. On June 23, 1988, NASA scientist James Hansen testified that the greenhouse effect had been detected. “Global Warming Has Begun,” The New York Times declared the next day. Indeed, it had. A year older than Alexander the Great when he died, climate change took less than one-third of a century to conquer the West. Four days earlier, the Toronto G7 had agreed that global climate change required “priority attention.” Before the month was out, the Toronto climate conference declared that humanity was conducting an uncontrolled experiment “whose ultimate consequences could be second only to a global nuclear war.” In September, Margaret Thatcher gave her famous speech to the Royal Society, warning of a global heat trap. “We are told,” although she didn’t say by whom, “that a warming of one degree centigrade per decade would greatly exceed the capacity of our natural habitat to cope,” an estimate that turned out to be …