Tonight, I ask you to join me in launching a new Clean Water Initiative, a far-reaching effort to clean our rivers, our lakes, our coastal waters for our children. Our overriding environmental challenge tonight is the worldwide problem of climate change, global warming, the gathering crisis that requires worldwide action. The vast majority of scientists have concluded unequivocally that if we don't reduce the emission of greenhouse gases, at some point in the next century we'll disrupt our climate and put our children and grandchildren at risk.