Utah, Minnesota, and Washington have seen traffic fatalities decline by 40 percent. Here's how they did it.
The Inner Harbor Water Wheel is proving to be an effective answer to the city's water pollution problem.
The city's mayor says the move will boost cycling in decades to come, creating a greener and more sociable city.
The secret ingredient in Boston's prize winning tap water? Forest conservation.
The ban is set to go into effect in October 2014, and will be the first of its kind in the nation.
"Pretty soon they're using it to travel downtown and expand their understanding of the community they live in."
The people behind the project borrowed some tricks from ride-sharing apps like Lyft, but tweaked the details so the rides are free.
Beyond the dangers of derailment and explosions, Seattleites are worried about oil-by-rail shipping's effect on the climate. Here's what they did about it.
Why moving utilities from corporate to public control puts energy, dollars, and decisions into the hands of local communities.
Conversations about how we're going to get through the coming transformation force us to see the full scale of the problem.
A plan to bring coal from Wyoming to the Pacific Northwest coast and ship it to Asia will test the mettle of the region's environmentalists.