Al Gore, on his website, flags this passage in Mitt Romney’s recent book No Apology: “I believe that climate change is occurring — the reduction in the size of global ice caps is hard to ignore. I also believe that human activity is a contributing factor.” Gore writes: “We can have disagreements about the solutions to this crisis, but we need to acknowledge fundamental truths. The science proving the existence of the climate crisis is not in question. That is where our debates about policy need to begin.” Romney, a potential 2012 GOP presidential candidate, and Gore certainly disagree on...