President Barack Obama delivers remarks on climate change, at Georgetown University in Washington, D.C., June 25, 2013. (Official White House Photo by Pete Souza) The effects of climate change are already being felt across the nation. In the past three decades, the percentage of Americans with asthma has more than doubled, and climate change is putting those Americans at greater risk of landing in the hospital. The impacts of extreme weather events – from more severe droughts and wildfires in the West, to more powerful hurricanes and record heat waves – are hitting communities across the country. These changes come with far-reaching consequences and real economic costs. At the same time, clean energy represents a significant economic opportunity, and we know we can meet this challenge in a way that advances our economy, our environment, and public health at the same time.