The EPA declares greenhouse gases a danger to human health that must be regulated, which could have a more far-reaching effect more quickly in the U.S. than agreements reached at the global climate conference in Copenhagen. Jeffrey Ball, energy and environment columnist for the Wall Street Journal, explains.

Small loans were once hailed as the key to raising living standards for poor people in places like Bangladesh, but new studies show that micro loans don't really raise incomes. But then, why are over a hundred and fifty million people across the world still looking for micro loans? We'll speak with Jonathan Morduch, professor of public policy and economics at NYU, and a co-author of "Portfolios of the Poor: How the World's Poor Live on $ 2 a Day." He's also co-director of the Financial Access Initiative, a consortium aimed at bringing financial services to poor people.

Dr. Lytle Adams was a dentist from Pennsylvania who had an unusual idea for attacking the Japanese after the attack on Pearl Harbor. Adams thought that bats could be enlisted to carry tiny bombs that would detonate in Japan; the idea, according to Nate DiMeo, made it all the way to the White House. DiMeo is producer of The Memory Palace.

Massachusetts voters go to the polls tomorrow to cast their ballots in a special primary election to fill the late Sen. Ted Kennedy's seat. Four democratic and two republican candidates are facing off. Here & Now's Fred Thys is our guest.

The movie "The Twilight Saga: New Moon" is a hit at the box office and with artists like Death Cab for Cutie, Lykke Li, and Radiohead's Thom Yorke, the soundtrack album has gotten rave reviews for its mix of indie rock. We speak with Alexandra Patsavis who was the music supervisor for the film.