Complete the second sentence so that it means the same as the first one

Complete the second sentence so that it means the same as the first one.

1. The rivers and canals are dry because there are many dams in the upstream.

Due to_____________________________________________________. 

2. The ocean water became contaminated by liquid petroleum as a result of the oil spills.

Because of_____________________________________________________.      

3. Because treated waste water isn’t used and properly managed, health effects occur.

If_____________________________________________________.         

4. People continue using plastic, there will be more plastic than fish in the ocean.

Unless_____________________________________________________. 

5. The reason why light pollution can cause a hazard is that it can cause diminished visibility.

Since _____________________________________________________.- 

6. Cars emit dangerous fumes, so lots of people die of diseases caused by air pollution.

If_____________________________________________________.         

7. Let’s encourage our friends to use biological bags instead of plastic ones.

Why_____________________________________________________.?

8. It’s a good idea for the governments to punish the polluters with large fines.

The governments should_____________________________________________________.