Last year’s extreme drought, wildfires and the devastation of Hurricane Sandy have driven home the high economic costs associated with extreme weather. The increasing frequency and intensity of such events make it clear that climate change presents a real and present danger. It no longer can be dismissed as a problem only of concern to our children or grandchildren.
This increased urgency has also caused an important shift in our understanding of what actions are required to slow the rate of climate change. Recent studies have focused on the need for a two-pronged approach. Reducing emissions of carbon dioxide, some portion of which stays in the atmosphere for centuries, is critical to long-term efforts. But curbing greenhouse gases with shorter atmospheric lifetimes will have significant near-term climate and public health benefits.