When to use pollution in Korean
Korean: 오염[ o-yeom ]

When to use it
Pollution (오염) means harmful or dirty things getting into the air, water, or land. It is used when talking about nature and the environment, like air pollution or water pollution. People also use this word when they talk about reducing waste and keeping the earth clean.
Example sentences
이 도시는 공기 오염이 심해요.
This city has serious air pollution.
강이 오염돼서 물이 더러워요.
The river is polluted, so the water is dirty.
선생님은 학교에서 오염 문제를 설명했어요.
The teacher explained the pollution problem at school.
우리는 해변 오염을 막으려고 쓰레기를 주웠어요.
We picked up trash to stop beach pollution.
엄마는 오염을 줄이려고 장바구니를 가져가요.
Mom brings a shopping bag to reduce pollution.
여행 중에 바다 오염을 보고 놀랐어요.
I was surprised to see ocean pollution during the trip.