Gender identity refers to the gender that each individual recognizes themselves as.

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

He is an expert in geophysics.

He believes in the geocentric theory.

A terrestrial planet may have an environment similar to Earth.

We are planning to visit the nature reserve this weekend.

This contract includes a warranty against defects.

He is facing many difficulties due to gender identity disorder.

I'm sorry, but I don't speak Japanese.

I'm a Muslim, so I fast during Ramadan.