He called a specialist to remove the virus from his computer.

The pollution of this river has become a serious problem.

In Buddhism, it is considered important to remove the dirtiness of the mind.

This river has been polluted by the waste from the factory.

Health is very important.

His opinion is very important.

He deeply believes in Buddhism.

He is a kind-hearted person.

It is important to understand the importance of health.

Mahayana is one of the major sects of Buddhism.