Match the opposites. 1. environmental pollution a. outdated
2. harmful b. to set apart
3. to solve a problem c. creation
4. complicated d. stagnation
5. to unify e. to die
6. enormous f. well-known facts
7. advanced g. small-scale
8. to exist h. environmental protection
9. discovery i. to separate
10.breakthrough j. easy
11.destruction k. to cause a problem
12.to include l. useful
