PHOTO GALLERY: 09.24.13 Subcommittee on Clean Air and Nuclear Safety hearing entitled, “Black Carbon – A Global Health Problem with Low-Cost Solutions.” September 25, 2013 - Permalink: https://www.epw.senate.gov/public/index.cfm/2013/9/gallery-56f4738c-9c12-b1c3-3973-b98cc83d4fcf