We camped in the lake district.

I try to drink 2 liters of water every day.

Mizu is my best friend.

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.

I am an Earthling.

We are searching for extraterrestrial life.

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

He believes in the geocentric theory.

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