Please give me a glass of water.

He drank water.

I am an Earthling.

We are searching for extraterrestrial life.

The process of terraforming is part of transforming other planets into a habitable environment for humans.

Earth science is an important field of study for unraveling the mysteries of nature.

Groundwater pollution has become a serious environmental problem.

The Earth's hydrosphere includes oceans, lakes, rivers, glaciers, and groundwater on Earth.

Global warming is a big issue that affects all of us.

He is an expert in geophysics.