@CNN: The Environmental Protection Agency has quietly signaled it may allow states to release more ozone air pollution, commonly known as smog https://t.co/0DgiK6A9Tj https://t.co/VnHVWHEUqf

@CNN: The Environmental Protection Agency has quietly signaled it may allow states to release more ozone air pollution, commonly known as smog https://t.co/0DgiK6A9Tj https://t.co/VnHVWHEUqf