While the current Clean Air Act has played a role in significantly improving some of these issues, additional reductions in the emissions of SO2, NOx, and mercury are necessary to address persistent public health and environmental problems.
The Clean Air Act played a role in improving the environment.
The Clean Air Act did nothing to improve the environment.
Would you like a room, Kirby?
People outdoors playing.
The children are eating PB&J sandwiches inside their kitchen.
A girl pointing out where to go in a park.
A person is on the ground in a car.
People are drinking at the house party.