In one word: safety. And, as Sarah Laskow explains, the more folks take to riding, the safer the streets become, so it builds on itself. Critical to road safety is bike infrastructure, like protected bike lanes, bike boxes and bike traffic signals.
In order to stave off the worst climate change scenarios, experts have recommended that the world's countries must aggressively expand their efforts to limit greenhouse gas emissions. Some surprising countries are headed in the opposite direction.
Regulations and a natural gas boom have helped reduce America's CO2 emissions to their lowest level since 1994. But CO2, and plenty of other toxic particles, continue to pollute our urban air. Brentin Mock looks at 5 highly polluted urban areas.
Though the Wall Street Journal's editorial board and Victoria's Secret Angels are unlikely to ride one, Citi Bikes have attracted a wide swath of New Yorkers. Apparently this also includes the city's ample supply of weirdos.
A year and 2.5 million public comments after the Obama Administration first proposed setting limits for the emission of carbon dioxide by power plants, the EPA is set to announce its final plan today. Could this mean the end of new coal plants?
New Orleans is planning a novel approach to managing the city's perpetual threat of floods. Instead of trying to prevent and pump out every last drop, the city will slow and store stormwater under a 50-year, $6.2 billion program of retrofits.
John Upton notes some startling changes among Gulf oil refineries - the ones that had been clamoring for the Keystone XL pipeline to be built in order to access Canada's oil sands. It's been two years - and the oil is flowing - with or without it.