Plants and phytoplankton ​ — single - celled algae found near the surface of lakes and oceans — ​ help to regulate carbon dioxide and oxygen levels in water and air.
Tumbuhan dan fitoplankton ​ — alga bersel tunggal yang berada di dekat permukaan danau serta lautan ​ — membantu menyesuaikan kadar karbon dioksida serta oksigen di air dan udara.