The Ozone layer, which mostly lies on the lower portion of the stratosphere.
How Long Did The Vietnam War Last. The Vietnam War is the longest war ever to have taken place in the American history. It lasted for 16 years and it was terrible for the Americans at that time as the Civil Rights campaign was at its peak and so also the Vietnam War and anti war protests.
The Cold War lasted about 45 years. There were no direct military campaigns between the two main antagonists, the United States and the Soviet Union.Yet billions of dollars and millions of lives were lost in the fight.or most of the second half of the 20th century, the USSR and the United States were engaged in a Cold War of economic and diplomatic struggles. The communist bloc, as it appeared in 1950, included countries to the west and southeast of the Soviet Union.