The results of stack emissions testing conducted at several coal-fired power plants during the past three years have provided useful guidance for plant operators who are required to meet new federal ...

For millions of Americans, emissions tests are a familiar piece of vehicle ownership. For others, moving to a new city or buying a new car can introduce this type of inspection for the first time.

Emissions testing laws are a crucial component in the fight against air pollution and climate change, yet these regulations vary significantly across the United States. Understanding these differences ...