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
바다의 산패는 해양 생태계에 큰 영향을 미칩니다.bada-ui sanpae-neun haeyang saengtaegye-e keun yeonghyang-eul michimnida.The acidification of the ocean has a significant impact on marine ecosystems.