October 25, 2010, 10am PDT
A new study published in the Proceedings of the National Academy of Sciences shows how population growth increases greenhouse gas emissions. More importantly, two demographic factors shape the increase, urbanization and aging -with opposite effects.
BBC News - Science & Environment
October 12, 2009, 6am PDT
A Grist writer and environmentalist takes a trip to the Talladega Superspeedway to try to understand what the petroleum-wasting is really all about.