He made three robots.

He exercises his body every day.

His body looks like that of an athlete.

The study of filterable pathogens is an important part of virology.

Electromagnetic radiation conveys energy in forms such as light and radio waves.

He is receiving treatment for brain radiation.

A cooling device utilizing the principle of radiative cooling has been developed.

The air in this area is greatly affected by pollutants emitted from factories.

This polluted water could potentially harm our health.

Soil pollution in this area has become serious due to years of industrial activity.