Northern Hemisphere Greening
NPR's Richard Harris reports on a new study showing that the Earth has become greener over the past 20 years. Scientists say spring is coming earlier in many parts of the globe, plants are growing lusher -- and the change could be due to global warming.
NPR's John Burnett in New Iberia, La., reports how major hurricanes such as Lili this week are destroying the fragile wetlands ecology along the Gulf coast. Biologists warn the wetlands being lost to storms and global warming are twice the size of the Everglades.