EcoCenter: Air
Forty years after the passage of the Clean Air Act, researchers have seen great progress while studying the dangers of pollution
![EcoCenter-Air-631.jpg](https://th-thumbnailer.cdn-si-edu.com/wQjndKp4zFgHpgd-SQHOjzBbBl8=/1000x750/filters:no_upscale()/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/EcoCenter-Air-631.jpg)
Please visit www.smithsonian.com/air for the full feature.
Forty years after the passage of the Clean Air Act, researchers have seen great progress while studying the dangers of pollution
Please visit www.smithsonian.com/air for the full feature.