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 Vietnam War was fought between communist North Vietnam and the government of Southern Vietnam. The North was supported by communist countries such as the People's Republic of China and the Soviet Union. The South was supported by anti-communist countries, primarily the United States. The United States lost the Vietnam War. It lasted for twenty years, something the US never expected when it joined in the fight.