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Official

The regulator says the technology is there and costs are falling.

Despite protests from some automakers, the US Environmental Protection Agency maintains its target for reduced greenhouse-gas emissions for 2025.

Featured

Federal Agency Aims To Rid Roads Of 400 More Older Diesel Engines

Diesel fumes are harming the health of children who ride school buses, so the Environmental Protection Agency is helping to provide cleaner rides.

Report

EPA May Have Been More Vigilant Than EU

Some European regulators may have known about cheat software as far back as 2011.

In a lawsuit filed in early July, Navistar, a U.S.-based manufacturer of heavy-duty diesel engines, accused U.S. Environmental Protection Agency director, Lisa Jackson, of not upholding the Clean Air Act and the Agency of not acting to protect public health. At issue is whether emissions-control systems that rely on a fluid (for example, a urea solution, commonly referred to as selective catalyst reduction or SCR) work in the real world, where the tanks may not be filled up.

In a lawsuit filed earlier this month, Navistar, a U.S.-based manufacturer of heavy-duty diesel engines, accused U.S. Environmental Protection Agency director, Lisa Jackson, of not upholding the Clean Air Act and the Agency of not acting to protect public health.