Cancer risk tied to railway pollution Post published:August 16, 2007 Post category:Health Issues NPR reported on “Railways’ Toxic Emissions Tied to Higher Cancer Risk”. You Might Also Like Study: Traffic pollution and exercise risks September 12, 2007 Land use and pollution issues on SCAT February 2, 2008 STEP and partners receive grant to study air pollution near I-93 May 18, 2010