Answer:
Natural vs synthetic materials
"Natural" products are made from natural resources, like wood and sand. "Synthetic" products are also made from natural resources. For example, the synthetic material plastic is made from petroleum, which is pumped out of the earth
Water availability is more of a concern in eastern Europe.
Some important cities that are located in the Rust Belt are:
1) Buffalo
2) Pittusburgh
3) Chicago
4) Cleveland
5) Detroit
6) Baltimore.
Hope this Helps!
