Promoting physical activity and reducing climate change: Opportunities to replace short car trips with active transportation

Automobile use is a significant contributor to climate change, local air pollution, pedestrian injuries and deaths, declines in physical activity and obesity. A significant proportion of car use is for short trips that can relatively easily be taken with active transportation options - walking or cycling - or with public transportation. In this commentary, we review a number of immediate, practical opportunities to implement policies and programs that reduce short car trips and increase active transportation. (C) 2009 Elsevier Inc. All rights reserved.