Word Network: 公害

Air pollution; the presence of harmful substances in the air.

A physical back-and-forth motion or vibration, typically periodic or repetitive. It is used to describe the shaking of machines, electronic devices like phones, or scientific phenomena like sound waves.

A sound, especially one that is loud or unpleasant or that causes disturbance. Often used in the context of urban living.

The practice of protecting the natural environment by individuals, organizations, and governments.