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.

His opinion had a big influence on my decision.

That news greatly influenced his opinion.

This problem is very serious.

Do you understand the seriousness of this problem?

We learned about the protection of the main sea.