CBS News: On Tuesday, President Obama unveiled a national plan to reduce carbon emissions and combat the effects of climate change by restricting pollution from power plants, improving the resiliency of America's infrastructure to guard against extreme weather, and leading a global effort to transition to clean energy. On Saturday, he again touted that plan and stressed the need for action in his weekly address, warning, "The question is not whether we need to act - the question is whether we will have the...