Globe and Mail: As you squeegee out your basement, replace your blown-off roof tiles, bury your heat-withered tomato crop and think about moving to a house on higher ground, you will be forgiven if you want to step out onto the street, tilt your head toward those odd-shaped clouds massing on the horizon, and scream, Fix it! And that might be a reasonable request. The weather is broken. To some degree, this is because we broke it: While it is foolish to link any individual extreme-weather event to the larger climate,...