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The improvement in air quality comes from reductions in toxic emissions from autos, trucks, and ships. Enjoying the cleaner air were tens of thousands of Angelenos riding on miles of streets closed to auto traffic for the 10th CicLAvia event.
Oct 8, 2014   Take Part
In time for Earth Day, American Rivers has released its annual list of the country's most threatened rivers. Topping this year's list is the Colorado River, a waterway so dammed, diverted and over-tapped that it ultimately "dries to a trickle."
Apr 22, 2013   Take Part