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.
video the vietnam war causes conflicts effects the vietnam war was the longest and most polarizing conflict in the history of the united states learn about the causes of the war as well as its effects on the united states over the course of 25 years 1950 1975 the united states battled north vietnam and its adherents in the longest conflict in american history known as the vietnam war