Daily Roundup: January 31, 2011

Lone Drivers: The percentage of workers who carpool has dropped by almost half since 1980, according to new census data. New York Times

An Ice-Free Arctic? A North Atlantic current flowing into the Arctic is warmer than it's been for at least 2,000 years, a study shows. Huffington Post

Blocking Action: Senator John Barasso (R-Wyo.) introduced a bill that would preempt any action by the EPA to limit greenhouse-gas emissions without congressional authorization. New York Times

No Spark: Despite the worst-ever year in roadside pollution, and a government campaign to encourage consumers to adopt zero-emissions vechicles, Hong Kong has very few takers when it comes to electric cars. Wall Street Journal

A Bright Path Ahead: The Netherlands plans to roll out an energy-generating bike path made of concrete blocks covered with solar cells. The electricity created will be used in homes, street lighting, and traffic systems. Inhabitat

--Molly Oleson