Tim Halbur

Daniel Nairn reviews Robert Kirkman's new book, The Ethics of Metropolitan Growth.

Four billion pounds of old carpet get dumped every year in the United States, and five pounds of oil goes into producing a single pound of nylon. New recycling methods could save all that oil by producing new nylon from old with little energy cost.

Sarah Goodyear at Grist gives seven ideas for New Year's resolutions you might consider for improving your community, including planting something, going for a walk, and getting to know your neighbors.

Yonah Freemark over at the Transport Politic presents an exhaustive catalog of openings and construction of new transit in the U.S., from the Wickford Junction Commuter Rail Extension in Rhode Island to Phase 1A of the Expo Line in Los Angeles.

National Geographic tackles the controversial issue of population growth, and the sustainability of a growing population. Should we worry about maxing out the planet? Not necessarily, according to Nat. Geo.