We are growing vegetables without using chemical fertilizers.

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

Understanding chemical equilibrium is very important in understanding chemical reactions.

This substance undergoes a chemical change when heat is applied.

In this experiment, you can observe a chemical reaction.

Photochemistry is a branch of chemistry that studies chemical reactions affected by light.

He works in the marketing division of the company.

He accepted my proposal and started the project.

I take classes every day.

His opinion had a big influence on my decision.