He explicitly stated that he supports the appeasement policy.

He strongly promoted the southward policy.

He is majoring in economics.

He is a renowned economist who has written many important papers.

He is facing economic problems.

The government has announced a new budget plan.

He is traveling around the world as an ecologist.

We must strive to protect the natural environment.

We should recycle to prevent environmental pollution.

We need to solve the problem in the production environment.