Those who shout the loudest about climate change tend to have a disproportionate influence, but we’ll never solve this challenge without being realistic and practical, says Eliot Wilson There was a time when climate change – ”global warming” was the argot when I was young – was accepted by politicians as a major challenge. Margaret Thatcher gave an historic address to the United Nations General Assembly in 1989 in which she declared the threat “has grown clearer than any other in both urgency and importance –…