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US truck industry in for dramatic green push

EPA may propose rules to cut greenhouse gas emissions from heavy-duty trucks, requiring that their fuel economy increase up to 40% by 2027

A truck being tested in the EPA's emissions lab. One of the largest vehicle testing centres in the world, the lab will play a crucial role in shaping and enforcing a major new environmental mandate by the US government that could dramatically transform America's trucking industry.

Ann Arbor, Michigan

INSIDE the National Vehicle and Fuel Emissions Laboratory here, a mammoth contraption, with steel rollers, advanced electronics and exhaust tubes, is nearing completion.

The project - an enormous "truck treadmill" - is the new centrepiece of the Environmental