spillionaire
A few of the recent pieces I've liked:
Maryn McKenna at Superbug: Superbugs Found in New Delhi's Water and Sewage
Kim Barker at ProPublica: 'Spillionaires': Profiteering and Mismanagement in the Wake of the BP Oil Spill
Darryl Fears in the Washington Post: Goldman Environmental Prize goes to Texas man who took on refineries over pollution
Janet D. Stemwedel at Adventures in Ethics and Science: Equal Pay Day 2011: There is power in a union
Martin Austermuhle in the Nation: Washington, DC: Where Conservative Congressmen Dump Bad Ideas