He is known as a person with learning.

In urban areas, smog has become a serious problem.

My major is chemical engineering.

He won a large amount of prize money.

Only one light was shining into the room.

He has the ability to change into a wolf.

He has a deep interest in archaeology.

Photochemistry is a branch of science that studies how chemical reactions proceed under the influence of light.

My major is chemical engineering.

He is an expert in fiber optics.