th bernard and audre rapor foundation. the john d. and catherine t. macarthur foundation, committed to building a more just, verdant, and peaceful world. more information at macfound.org. anne gumowitz. the betsy and jesse fink foundation. the hkh foundation. barbara g. fleischman. and by our sole corporate sponsor, mutual of america, designing customized individual and group retirement products. that's why we're your retirement company. >> welcome. these days what should be scaring the daylights out of us, the crisis which could make all the others irrelevant, is global warming. get this one wrong and it's over, not just for the usa but for planet earth. that's the message delivered by hurricane sandy last fall, and by almost all the extreme weather of the past two years. and it's the message from the most informed scientists in the world. they're scared, for real. and they say that unless we slow the release of global emissions from fossil fuels, slow it enough to keep the planet's temperature from rising by 2 degrees celsius, or 3.6 degrees fahrenh