With 55 percent of its residents cycling to their place of work or education each day, Copenhagen has succeeded in changing its transportation system--and improving quality of life along the way.
What do you do when someone uses a photo of yours without permission? We take a closer look at online copyright infringement, and speak with photographers who have seen their work spread far and wide without credit.
Best-case scenario: one-fifth of world's electricity will be generated by wind by 2030, with China making most of world's wind turbines.
Document obtained by Reuters that lists U.S. questions to delegates from among the world's top emitters suggests they may have to go back to the drawing board.
President's statement hardens widespread verdict that the climate conference was a failure.
A new take on storing and boosting power, keeping track of nearby friends, and monitoring traffic, fitness, and fog has bike/health enthusiasts scratching their heads.
With international climate change talks a week away, the host city takes its tannenbaum off-grid with a rack of bicycles powering LED lights.