U.S. Steel unveiled two battery-powered locomotives it will use at its plants outside of Pittsburgh. It’s a small step to reduce the carbon footprint of one of the top greenhouse gas polluters in Pa. We’ll also hear about the legacy of the first lawsuit against the makers of the weedkiller Roundup, alleging it caused cancer, and why toxic pesticides are still on the market. Plus, what the auto workers’ strike and tentative agreement with American carmakers have to do with the transition to electric vehicles.

News about a voluntary agreement between gas driller CNX and DEP to monitor air and other measures, a canceled offshore wind project, and a court decision that prohibits Pennsylvania from joining a carbon trading program to reduce power plant emissions.