Which term describes a natural environment that absorbs more carbon dioxide than it releases?

Which term describes a natural environment that absorbs more carbon dioxide than it releases?

• A. Bioremediation
• B. Brackish water
• C. Carbon sink
• D. Bund

Answer: (C)

A carbon sink is a natural environment that absorbs more carbon dioxide from the atmosphere than it releases back. This happens through processes like photosynthesis, where plants and algae take in CO2 and store it in biomass and soil, and through the oceans, where CO2 dissolves in seawater and becomes part of marine organisms and sediments. Over time, carbon can be stored in forests, soils, and deep ocean carbon stores, helping to slow the buildup of atmospheric CO2 and influence climate. Bioremediation is about using living organisms to remove pollutants from the environment, not about storing carbon. Brackish water is simply water with a mix of fresh and saltwater, defined by its salinity. A bund is a raised embankment or barrier used to hold back water. None of these describe a natural system that stores more carbon than it releases.

A carbon sink is a natural environment that absorbs more carbon dioxide from the atmosphere than it releases back. This happens through processes like photosynthesis, where plants and algae take in CO2 and store it in biomass and soil, and through the oceans, where CO2 dissolves in seawater and becomes part of marine organisms and sediments. Over time, carbon can be stored in forests, soils, and deep ocean carbon stores, helping to slow the buildup of atmospheric CO2 and influence climate.

Bioremediation is about using living organisms to remove pollutants from the environment, not about storing carbon. Brackish water is simply water with a mix of fresh and saltwater, defined by its salinity. A bund is a raised embankment or barrier used to hold back water. None of these describe a natural system that stores more carbon than it releases.