Marine pollution is a global issue, and all countries should cooperate to find a solution.

Thermal pollution can potentially have serious effects on marine life.

The possibility of that plan succeeding is high.

His actions exerted a great influence on our plans.

I am very interested in marine biology.

This problem is very serious.

Do you understand the seriousness of this problem?

His opinion had a big influence on my decision.

That news greatly influenced his opinion.

We learned about the protection of the main sea.