carbon sink
noun [ C ] environment specialized uk/ˈkɑː.bən ˌsɪŋk/ us/ˈkɑːr.bən ˌsɪŋk/
碳汇，碳库（可通过吸收地球大气中的二氧化碳减缓全球变暖的大片森林）
an area of forest that is large enough to absorb large amounts of carbon dioxide from the earth's atmosphere and therefore to reduce the effect of global warming