Oil-and-gas wells produce nearly a trillion gallons of toxic waste a year. An investigation shows how it could be making workers sick and contaminating communities across America.

In 2008, a federally owned power plant spewed coal sludge over 300 acres in Tennessee. Now, 40 people who helped clean up the mess are dead and 300 ill.

An investigation into the steady dismantling of safety nets for injured workers.

The battle over safety at chemical plants amidst the death of a worker.