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S37E04: Clearing the Air: The War on Smog

A chronicle of how Los Angeles' devastating smog problem in the 1940s and 50s led to the creation of the Environmental Protection Agency (EPA) and the Clean Air Act.

Genres:

Air Date:

Aug 26, 2025

Runtime:

53 minutes

Casts:

American Experience

The Great San Francisco Earthquake

Indians, Outlaws and Angie Debo

Eric Sevareid's Not So Wild A Dream

The Life and Times of Rosie the Riveter

Do You Mean There Are Still Real Cowboys?

Kennedy vs. Wallace: A Crisis Up Close

Geronimo and the Apache Resistance

Let Us Now Praise Famous Men: Revisited

That Rhythm, Those Blues

The Radio Priest

Hearts and Hands

Views of a Vanishing Frontier

Eudora Welty: One Writer's Beginnings

The World That Moses Built

Sins of Our Mothers

The Great Air Race of 1924

A Family Gathering

The Great War: 1918

Wildcatter: A Story of Texas Oil

Forever Baseball

Mr. Sears' Catalogue

Yosemite: The Fate of Heaven

Adam Clayton Powell

Journey to America

Ballad of a Mountain Man

Ida B. Wells: A Passion for Justice

Orphans of the Storm

Forbidden City, USA

Battle for Wilderness

Roots of Resistance: The Story of the Underground Railroad

Nixon (1): The Quest

Nixon (2): Triumph

Nixon (3): The Fall

God Bless America and Poland, Too

Insanity on Trial

The Satellite Sky

The Crash of 1929

French Dance Tonight

After the Crash

The Massachusetts 54th Colored Infantry

Scandalous Mayor

The Johnstown Flood

Pearl Harbor: Surprise and Remembrance

G-Men: The Rise of J. Edgar Hoover

Duke Ellington: Reminiscing in Tempo

The Quiz Show Scandal

Love in the Cold War

Barnum's Big Top

In the White Man's Image

The Kennedys (1): The Father, 1900-61

The Kennedys (2): The Sons, 1961-80

The Donner Party

Liberators: Fighting on Two Fronts in World War II

George Washington: The Man Who Wouldn't Be King

Last Stand at Little Big Horn

If You Knew Sousa

Knute Rockne and His Fighting Irish

Sit Down And Fight

Rachel Carson's Silent Spring

Goin' Back to T-Town

Ishi: The Last Yahi Indian

Amelia Earhart: The Price of Courage

The Hunt for Pancho Villa

Ike (1): Soldier

Ike (2): Statesman

Malcolm X: Make It Plain

America and the Holocaust: Deceit and Indifference

D-Day Remembered

The Hurricane of '38

FDR (1): The Center of the World (1882-1921)

FDR (2): Fear Itself (1922-1933)

FDR (3): The Grandest Job in the World (1933-1940)

FDR (4): The Juggler (1940-1945)

Telegrams from the Dead

Midnight Ramble

Battle of the Bulge

One Woman, One Vote (1)

One Woman, One Vote (2)

The Way West (1): Westward, the Course of Empire Takes Its Way (1845-1864)

The Way West (2): The Approach of Civilization (1865-1869)

The Way West (3): The War for the Black Hills (1870-1876)

The Way West (4): Ghost Dance (1877-1893)

Murder of the Century

Edison's Miracle of Light

The Orphan Trains

Freedom on My Mind

Daley: The Last Boss

The Battle Over Citizen Kane

The Wright Stuff

T.R.: The Story of Theodore Roosevelt (1): The Long Campaign

T.R.: The Story of Theodore Roosevelt (2): The Bully Pulpit

The Richest Man in the World: Andrew Carnegie

Hawaii's Last Queen

Big Dream, Small Screen

New York Underground

Troublesome Creek: A Midwestern

Around the World in 72 Days

Vietnam: A Television History (Part 1 & 2)

Vietnam: A Television History (3): LBJ Goes to War

Vietnam: A Television History (4): America Takes Charge

Vietnam: A Television History (5): America's Enemy

Vietnam: A Television History (6): Tet 1968

Vietnam: A Television History (7): Vietnamizing the War

Vietnam: A Television History (8): Cambodia and Laos

Vietnam: A Television History (9): Peace is at Hand

Vietnam: A Television History (10): Homefront USA

Vietnam: A Television History (11): The End of the Tunnel

T.R.: The Story of Theodore Roosevelt (3): The Good Fight

T.R.: The Story of Theodore Roosevelt (4): Black Care

Truman (1): An Accident of Democracy

Truman (2): The Moon, the Stars and All the Planets

A Midwife's Tale

Mr. Miami Beach

Reagan (1): Lifeguard

Reagan (2): An American Crusade

Surviving the Dust Bowl

Riding the Rails

Race for the Superbomb

Alone on the Ice

Meltdown at Three Mile Island

Lost in the Grand Canyon

MacArthur (1): Destiny

MacArthur (2): The Politics of War

New York (1): The Country and the City

New York (2): Order and Disorder

New York (3): Sunshine and Shadow

New York (4): The Power and the People

New York (5): Cosmopolis

Eleanor Roosevelt

Nixon's China Game

John Brown's Holy War

George Wallace: Settin' the Woods on Fire (1)

George Wallace: Settin' the Woods on Fire (2)

Jubilee Singers: Sacrifice and Glory

Joe DiMaggio: The Hero's Life

The Wizard of Photography

The Rockefellers (1)

The Rockefellers (2)

Secrets of a Master Builder

Return with Honor

Streamliners: America's Last Trains

Marcus Garvey: Look for Me in the Whirlwind

Abraham and Mary Lincoln: A House Divided, Part I

Abraham and Mary Lincoln: A House Divided, Part II

Abraham and Mary Lincoln: A House Divided, Part III

Scottsboro: An American Tragedy

Abraham and Mary Lincoln: A House Divided, Part IV

Abraham and Mary Lincoln: A House Divided, Part V

Abraham and Mary Lincoln: A House Divided, Part VI

New York (6): The City of Tomorrow

New York (7): The City and the World

Woodrow Wilson (1): A Passionate Man

Woodrow Wilson (2): The Redemption of the World

Zoot Suit Riots

Public Enemy #1

A Brilliant Madness

Ulysses S. Grant (1): The Warrior

Ulysses S. Grant (2): The President

Jimmy Carter (1): Jimmy Who?

Jimmy Carter (2): Hostage

Chicago: City of the Century (1): Mudhole to Metropolis

Chicago: City of the Century (2): The Revolution Has Begun

Chicago: City of the Century (3): Battle for Chicago

The Murder of Emmett Till

Transcontinental Railroad

Partners of the Heart

Daughter from Danang

Murder at Harvard

New York (8): The Center of the World

Reconstruction: The Second Civil War (1): Revolution

Reconstruction: The Second Civil War (2): Retreat

Remember the Alamo

Golden Gate Bridge

RFK (Part 1 & 2)

Building the Alaska Highway

The Great Transatlantic Cable

The Massie Affair

Victory in the Pacific

The Carter Family: Will the Circle Be Unbroken?

Guerilla: The Taking of Patty Hearst

Two Days in October

Race to the Moon

Las Vegas: An Unconventional History (1): Sin City

Las Vegas: An Unconventional History (2): American Mecca

John and Abigail Adams

The Nuremberg Trials

The Boy in the Bubble

The Alaska Pipeline

The Man Behind Hitler

Eyes on the Prize (1 & 2): Awakenings 1954-1956 / Fighting Back 1957-1962

Eyes on the Prize (3 & 4): Ain't Scared of Your Jails 1960-1961/No Easy Walk 1961-1963

Eyes on the Prize (5 & 6): Is This America? 1963-1964 / Bridge to Freedom 1965

Test Tube Babies

The Great Fever

The Berlin Airlift

The Living Weapon

New Orleans (1 & 2)

Jonestown: The Life and Death of Peoples Temple

The Mormons (1): History

The Mormons (2): Church and State

Alexander Hamilton

Eyes on the Prize (7 & 8): The Time Has Come/Two Societies

Eyes on the Prize (9 & 10): Power!/The Promised Land

Eyes on the Prize (11 & 12): Ain't Gonna' Shuffle No More/A Nation of Law?

Eyes on the Prize (13 & 14): The Keys to the Kingdom/Back to the Movement

Minik: The Lost Eskimo

Roberto Clemente

George H.W. Bush (1)

George H.W. Bush (2)

The Trials of J. Robert Oppenheimer

The Polio Crusade

The Assassination of Abraham Lincoln

We Shall Remain (1): After the Mayflower

We Shall Remain (2): Tecumseh's Vision

We Shall Remain (3): Trail of Tears

We Shall Remain (4): Geronimo

We Shall Remain (5): Wounded Knee

The Civilian Conservation Corps

The Bombing of Germany

Roads to Memphis

Into the Deep: America, Whaling and the World

God in America (Parts 1–2)

God in America (Parts 3-4)

God in America (Parts 5-6)

The Greely Expedition

The Great Famine

Stonewall Uprising

Soundtrack for a Revolution

Custer's Last Stand

Clinton: The Comeback Kid (1)

Clinton: The Survivor (2)

Grand Coulee Dam

Death and the Civil War

The Abolitionists: 1820s-1838

The Abolitionists: 1838-1854

The Abolitionists: 1854-Emancipation and Victory

War of the Worlds

The Poisoner's Handbook

The Amish: Shunned

Butch Cassidy & the Sundance Kid

The Rise and Fall of Penn Station

Cold War Roadshow

Ripley: Believe It or Not

Klansville, USA

The Forgotten Plague

Last Days In Vietnam

Walt Disney (1)

Walt Disney (2)

American Comandante

Murder of a President

The Perfect Crime

The Boys of '36

The Battle of Chosin

Command and Control

The Race Underground

The Great War: Part 1

The Great War: Part 2

The Great War: Part 3

Into the Amazon

The Secret of Tuxedo Park

The Bombing of Wall Street

The Island Murder

The Chinese Exclusion Act

The Circus (Part 1)

The Circus (Part 2)

The Eugenics Crusade

Chasing the Moon - A Place Beyond the Sky

Chasing the Moon - Earthrise

Chasing the Moon - Magnificent Desolation

The Poison Squad

The Man Who Tried to Feed The World

George W. Bush (Part 1)

George W. Bush (Part 2)

The Vote (Part 1)

The Vote (Part 2)

The Codebreaker

Voice of Freedom

The Blinding of Isaac Woodard

Sandra Day O'Connor: The First

Citizen Hearst (1)

Citizen Hearst (2)

Riveted: The History of Jeans

The American Diplomat

Flood in the Desert

Plague at the Golden Gate

Taken Hostage (1)

Taken Hostage (2)

The Lie Detector

Zora Neale Hurston: Claiming a Space

Ruthless: Monopoly's Secret History

The Movement and the Madman

The Busing Battleground

The Harvest: Integrating Mississippi's Schools

The War on Disco

Forgotten Hero: Walter White and The NAACP

Change, Not Charity

Clearing the Air: The War on Smog

Kissinger (Part One)

Kissinger (Part Two)

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