I urge you to join Representative Markey in co-sponsoring HR 759, the Climate Stewardship Act. This bill would provide for scientific study of the nature and extent of climate change caused by human activities, and would establish am efficient, market-based system of emissions trading in order to reduce greenhouse-gas emissions. Climate change is a phenomenon that affects all of us, and creating a national market for emissions credits is a proven strategy to help address such problems of global reach.