Urban designer Peter Calthorpe says there is one simple thing cities can do to cool down every summer: plant trees. NewsHour's Hari Sreenivasan spoke with Calthorpe at the Aspen Environment Forum this summer about how cities need to have more vegetation and fewer cars in order to adapt to a changing climate.
PBS NewsHour provides in-depth analysis of current events with a news summary, live studio interviews and discussions of domestic and international issues. Amna Nawaz and Geoff Bennett co-anchor.