June 16, 2012, 9am PDT
While California's high speed rail project will be beneficial for the environment by turning polluting car and plane trips into zero-emission travel by train, there are formidable environmental challenges it must overcome in the construction phase.
February 1, 2012, 5am PST
The city’s MillionTrees program fights asthma and global warming. But tightening maintenance budgets, increasingly severe weather and decades-old planting decisions complicate trees’ contribution.
July 4, 2010, 7am PDT
Arlington, TX Mayor Robert Chuck is also a physician, acutely aware of the effects of ozone air pollution in his city. In this Q & A with Grist's Jonathan Hiskes, he describes ozone's causes and effects and his role as mayor.