Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
환경학은 지구의 생태계와 인간의 영향을 연구하는 학문입니다.hwan-gyeonghak-eun jigu-ui saengtaegye-wa ingan-ui yeonghyang-eul yeonguhaneun hakmun-imnida.Environmental science is the study of Earth's ecosystems and human impacts.