On land grass and other plants provide ecosystems with food and play an essential role in binding CO2 from the atmosphere. Microscopically small plants called algae fulfill this role in the world’s oceans. As plants on land, these tiny algae depend on nutrients and sunlight for growth. Rising global temperatures have led to sea ice melt in polar seas, allowing more light to reach the algae in the seawater. Still researchers are unsure if sea ice melt will give a greener Arctic Ocean, supporting more marine life and increased fisheries.
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