New Thinking To Save The Earth

This week, spring fever takes the form of the fever pitch to which concern over global warming is rising. Last Saturday was the National Day of Climate Action, a campaign organized by writer Bill McKibben, aimed at getting Congress to "step it up" and cut US carbon emissions 80 percent by 2050. Next Sunday is Earth Day -- part festival and part political demonstration, always a call to action for the environment.The urgency of such events comes from recent scientific reports that make impending ecological catastrophes more vivid than ever.