Keep our air clean! Not just in one state but in the UNITED states.

It's laughable that we have to defend statutes to keep our air clean. It's kind of a no brainier. Given situations like Flint, and my home town of Horsham PA, in which the EPA's testing of groundwater found harmful levels of PFOS, we should be seeing an uptick in environmental regulations, not a decline.

Clean Air is crucial for our health and safety and the health and safety of future generations.

Let's have air like CHINA. Makes perfect sense

Clean air and water are basic to the health and welfare of all citizens of this country. Pollution knows no boundaries and any legislation that degrades current regulations has the potential to endanger us now and for generations in the future.

Toomey, you know what Pittsburgh used to look like and how far it's come. That was before we had laws in place by the EPA. Stop being such an epic POS.

This is a question of States Rights- one state may not pollute the air of another. Air quality, as well as natural resource depletion and pollution know not the political boundaries of state lines. Keep protections in place that prevent others from polluting and damaging our natural resources

Congress doesn't understand the consequences of air pollution and the science behind global warming.

Air pollution does not respect state boundaries, it is a national problem.

These updates are for good - cleaner air for all. As Roy said, air pollution does not respect state boundaries. For those who want more info: https://www.epa.gov/ozone-pollution/2015-revision-2008-ozone-national-ambient-air-quality-standards-naaqs-supporting