Before the industrial revolution, the atmosphere's CO₂ content was regulated mainly by plants. This is because plants, together with some organisms, absorb carbon dioxide.
Carbon dioxide, with the chemical formula CO₂, is a chemical compound that is made up of molecules that each have one carbon atom that is covalently double bonded to two oxygen atoms. At room temperature, carbon dioxide is found in the gas state.
Carbon dioxide in the air is transparent to visible light, but it absorbs infrared radiation so it acts as a greenhouse gas. Carbon dioxide is soluble in water, and it is found in groundwater, ice caps, lakes and seawater.
Plants, cyanobacteria and algae use energy from sunlight to synthesize carbohydrates from CO₂ and water in a process called photosynthesis.
Learn more about the process of photosynthesis at https://brainly.com/question/26568636.
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