The Trump administration is moving to limit obligations on certain upwind states to cut smog pollution from their power ...

Q: Many years ago, California began exempting older cars from having to complete a smog check to renew the vehicle registration for the year, Roy Saldin of Moreno Valley said.

In an about-face, the agency would instead approve five state "good neighbor" plans, thereby potentially skirting new pollution control requirements.

If finalized, this rollback will exempt 10 states from the Good Neighbor Plan and its limits on smog-forming pollution from power plants.

Two environmental groups that sued to force EPA action on smog cleanup in the Phoenix area are bashing the agency’s proposal to instead seek a waiver that pins the blame on international pollution.

Every winter, Pakistan’s air quality drops to dangerous levels, blanketing major cities under thick, toxic smog. According to ...