Rich planet, poor planet / Christopher Flavin
Uncovering groundwater pollution / Payal Sampat
Eradicating hunger: a growing challenge / Lester R. Brown
Deciphering amphibian declines / Ashley Mattoon
Decarbonizing the energy economy / Seth Dunn
Making better transportation choices / Molly O'Meara Sheehan
Averting unnatural disasters / Janet N. Abramovitz
Ending the debt crisis / David Malin Roodman
Controlling international environmental crime / Hilary French and Lisa Mastny
Accelerating the shift to sustainability / Gary Gardner.