This shirt is made of chemical fiber.

I love organic chemistry classes.

He is dedicated to the study of immunochemistry.

Chemical pollution has a serious impact on the health of the Earth.

Thermochemistry is a part of chemistry that deals with the reactions of heat and matter.

Oxygen, which is one of the chemical elements, is necessary for us to breathe.

He is an expert in chemical analysis.

It's difficult to decipher this chemical equation.

Understanding chemical equations is difficult.

We are growing vegetables without using chemical fertilizers.