Chunks of coal fill a circle in one ... contain paint sourced from longstanding pollution in a nearby stream. "Iron oxide sludge," says Sabraw an art professor at Ohio University.

Until recently, it also was the single largest source of US carbon pollution. Today, coal’s future in the US power system is uncertain. Many plants are losing in the face of economic competition from ...

Despite its coal-fired generators, Berkshire has invested some $41 billion in alternative energy generation ... “assigns an economic value to pollution variables, calculating the economic ...