planetary boundary layer

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Learn how pollution from industrial emissions and car exhaust is trapped against mountains to cause smog

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Earth from space. Full-hemisphere views of the Earth showing Hurricane Linda at its peak approaching Baja California on 1997 September 11.

What Is Earth’s Velocity?

September 11, 2005, ozone thinning over antarctica reached its maximum extent for the year.

Is the Ozone Layer Finally Healing Itself?

Lightning over the outskirts of Oradea, Rom., during the thunderstorm of August 17, 2005.

16 Questions About Earth’s Atmsophere and Weather Answered

Solar system illustration. (planets; sun)

Why Are Planets Round?

Remarkable new details of Pluto's largest moon Charon are revealed in this image from New Horizons' Long Range Reconnaissance Imager (LORRI), taken late on July 13, 2015 from a distance of 289,000 miles

Why Is Pluto No Longer a Planet?

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Red Army (Soviet) soldiers in the Russian Revolution.

Russian Revolution Timeline

Nazi Germany, Nazi SS troops marching with victory standards at the Party Day rally in Nuremberg, Germany, 1933. (Schutzstaffel, Nazi Party, Nurnberg)

Why Was Nazi Germany Called the Third Reich?

Chinese pictograph, calligraphy tablet of Huang Tingjian, a famous calligrapher in Ancient Song Dynasty. The background of Chinese cultural elements.

The World’s 5 Most Commonly Used Writing Systems

Prince. musician Prince (Prince Rogers Nelson). Prince WELCOME 2 AMERICA tour. Exclusive North American Performances, 2010-11

7 Celebrities You Didn’t Know Were Inventors

Town of Sisimiut located on the coast of the Davis Strait on Kangerluarsunnguaq Bay, Greenland

The Largest Islands in the World

Washington, D.C. locator map.

What State Is Washington, D.C. In?

Alexandria, Egypt - September 12, 2014 - Wedding Bridesmaids Competition, reward for Best Bridesmaids for participation in competitions. Prize for victory

Who Votes for the Academy Awards?

planetary boundary layer: Media

atmospheric science

Videos

Learn how pollution from industrial emissions and car exhaust is trapped against mountains to cause smog

Learn how pollution from industrial emissions and car exhaust is trapped against mountains to cause smog

Smog formation and entrapment over Los Angeles.

Video: Encyclopædia Britannica, Inc.

VIEW MORE in these related Britannica articles: