Reuters: To address the serious threat of global warming, Americans should be required to "pay" for the carbon content of goods they consume from countries around the world, a top U.S. official said on Friday. "It’s important that those who consume the products being made all around the world to the benefit of America — and it’s our own consumption activity that’s causing the emission of greenhouse gases, then quite frankly Americans need to pay for that," Commerce Secretary Gary Locke told …