Biomass energy is one of the renewable energy sources.

It is very important to understand the risks of biohazard.

Bioterrorism is a serious threat to modern society.

The threat of bioterrorism is a very serious issue for all of us.

Tsarism was a historical political system in Russia.

He loves rhythm & blues music.

He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.

Using the private railway makes commuting very convenient.

We respect Japanese culture.