This was known as the "iron curtain." It was a term used to describe the boundary in Europe, which formed at the end of WWII and lasted until the ending of the Cold War.
Answer:
Sustainable: Able to use a resource without destroying it or using it up
Dispose: To throw something away
Pollution: Substances that make air, land and water dirty and unsafe for use
Deforestation: The act or result of harvesting all the trees in an area
The way the rocks were formed. Earthquake wave data.