Oceans, rivers, lakes -- one look at these beautiful maps of smartphone data show just how much we love to run next to bodies of water.
Thanks to some of the past year's less-expected developments, environmentalism and the climate movement may have some rare opportunities for progress in 2015.
From rising sea levels and acidifying oceans to rural roads and dollar buses, these exercises in eco-cartography will open your eyes.
From Keystone to Ferguson, the climate march to New York's fracking ban, here are the highs and lows of a pivotal year for the planet.
RIP Theo Colborn, a scientist who alerted us to the issue of endocrine-disrupting chemicals.
The so-far successful effort to halt Keystone has schooled a whole new wave of protest movements against similar projects.
In the wave of protests over the police killings of Eric Garner and Michael Brown, confidence and outrage are helping people of color shed decades of caution.
Filmmaker-author Astra Taylor talks about Occupy, debt relief, why the environmental movement needs organization more than scale, and the nature of democratic change.
Two activists who devised the phrase "Black Lives Matter" discuss its origins -- and why they took their demonstration to the Bay Area's transit system last week.
We've devised the world's shortest survey to find out what kind of actions our readers are taking. You know you want to.