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American Experience

Clearing the Air: The War on Smog

Season 37 Episode 4

In 1943, dark, smoky clouds enveloped Los Angeles, causing residents to complain of burning eyes, nausea, and difficulty breathing. The source of the smog was a mystery. CLEARING THE AIR: THE WAR ON SMOG is the story of the epic struggle for clean air, involving years of scientific study and civic pressure that would lead to the creation of the EPA and the Clean Air Act. From AMERICAN EXPERIENCE.

Aired: 08/25/25
Corporate sponsorship for American Experience is provided by Liberty Mutual Insurance and Carlisle Companies. Major funding by the Alfred P. Sloan Foundation.
Extras
Watch • 2:22
American Experience
Trailer | Clearing the Air: The War on Smog
Watch a preview of Clearing the Air: The War on Smog.
Preview: S37 E4 | 2:22
Watch • 1:58
American Experience
Why do people shake Polaroid pictures?
We were told to "shake it like a Polaroid picture". But what if we got it wrong?
Clip: S37 E3 | 1:58
Watch • 3:08
American Experience
The Women of Polaroid
The women behind the camera.
Clip: S37 E3 | 3:08
Watch • 9:18
American Experience
Chapter 1 | Mr. Polaroid
Watch a preview of Mr. Polaroid.
Preview: S37 E3 | 9:18
Watch • 1:45
American Experience
Trailer | Mr. Polaroid
The story of Edwin Land, whose iconic Polaroid camera let everyone instantly chronicle their lives.
Preview: S37 E3 | 1:45
Watch • 2:24
American Experience
Trailer | Change, Not Charity: The Americans with Disabilities Act
The dramatic story of the passage of the Americans with Disabilities Act (ADA) in 1990.
Preview: S37 E2 | 2:24
Watch • 2:23
American Experience
Trailer | ASL | Change, Not Charity: The Americans with Disabilities Act
ASL The dramatic story of the passage of the Americans with Disabilities Act (ADA) in 1990.
Preview: S37 E2 | 2:23
Watch • 9:17
American Experience
Chapter 1 | Change, Not Charity: The Americans with Disabilities Act
Watch a preview of Change, Not Charity: The Americans with Disabilities Act.
Clip: S37 E2 | 9:17
Watch • 9:17
American Experience
Chapter 1 | ASL | Change, Not Charity: The Americans with Disabilities Act
ASL Watch a preview of Change, Not Charity: The Americans with Disabilities Act.
Clip: S37 E2 | 9:17
Watch • 2:50
American Experience
Trailer | Extended Audio Description | Change, Not Charity: The Americans with Disabilities Act
EXTENDED AD The dramatic story of the passage of the Americans with Disabilities Act (ADA) in 1990.
Preview: S37 E2 | 2:50