It's not newsworthy that a prominent scientist believes the Earth is warming; an overwhelming majority of scientists do. But the reason Richard Muller is getting national attention is that he is a former skeptic whose research was partly funded by the Charles Koch Foundation. Muller spent two years trying to find out if mainstream climate scientists were wrong, but he concluded that temperatures really are rising rapidly, Associated Press reported. Muller's research did not address whether the cause of global warming was man-made or some natural phenomena, as the Koch Foundation noted. However, he said it made sense to reduce the carbon dioxide created by fossil fuels. "Greenhouse gases could have a disastrous impact on the world," he said.