ClimateThe time of global warming as a controversy is over. Nearly all of the skeptics have come around. Thousands of scientists have gathered and analyzed trillions of bits of data and constructed sophisticated climate models using the world's most powerful computers. They have used those models to explain the environmental changes that are now being observed. And they have arrived at a consensus. The data, the models, the observations, and the anecdotes all point in the same direction: Earth is warming, and human activities are largely to blame.
