We have a responsibility to protect the biodiversity of the Earth.

Phytobenthos is an important part of the marine ecosystem.

The ecosystem of zoobenthos is an important field of study in marine biology.

He is researching about a new energy source.

He is conducting research on a new energy source.

He is known as a person with learning.

I think draft beer is more delicious than bottled beer.

This math problem requires finding out what the base of the logarithm is.

What is at the bottom of this lake?

It is important to understand the importance of health.