Hyperinflation has a serious impact on the economy.

His actions exerted a great influence on our plans.

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.

He is an expert in economics.

The environmental issues are becoming more serious.

Environmental issues are becoming more serious day by day.

His words had a great influence.