Q:

Where does carbon dioxide come from?

A:

Carbon dioxide is generated through the oxidation of carbon or carbon compounds, including combustion and cellular respiration. Carbon dioxide is also released into the atmosphere when water thaws, as well as during volcanic eruptions. While many fear its theorized effects on global temperatures, carbon dioxide is absolutely essential to the vast majority of life on Earth.

The vast majority of carbon dioxide released into the atmosphere each year comes from natural sources. Animals and microbes together release about the same amount of carbon dioxide as plants, while the oceans are the greatest single source. Only about 4 percent of carbon dioxide emissions come from artificial human sources. Carbon dioxide currently constitutes about 0.03 percent of Earth's atmosphere.

Carbon dioxide is one of the crucial inputs for producers at the base of almost every food chain. The basic mechanism of photosynthesis is the use of solar energy to bond water and carbon dioxide into carbohydrates. Plants grow faster at higher carbon dioxide levels, since most of their structures are built from carbohydrates. Carbon dioxide is toxic to humans at higher concentrations,but normal atmospheric concentrations of carbon dioxide, even with any conceivable increase due to human activity, are far too low to risk toxicity.


Is this answer helpful?

Similar Questions

  • Q:

    How do plants use carbon dioxide?

    A:

    Plants use carbon dioxide to produce food. Through photosynthesis, they convert carbon dioxide and water into sugar. They derive energy from the sun to transform carbon dioxide into glucose and oxygen.

    Full Answer >
    Filed Under:
  • Q:

    How do plants absorb carbon dioxide?

    A:

    Plants absorb carbon dioxide from the air, through the stomata present in their leaves. Stomata are small holes that are present in the underside of leaves.

    Full Answer >
    Filed Under:
  • Q:

    How does carbon dioxide affect plant growth?

    A:

    Plants require carbon dioxide for growth. It is a necessary ingredient for photosynthesis in which the plant creates glucose and structural carbon that forms the plant body. According to Nature Education, approximately 96 percent of the typical dry plant mass is due to compounds created through photosynthesis using carbon dioxide.

    Full Answer >
    Filed Under:
  • Q:

    What is carbon dioxide?

    A:

    Carbon dioxide is a colorless, non-organic compound that is a gas at room temperature and comprises about 0.03 percent of Earth's atmosphere. It is produced when materials that contain carbon are combusted, and it is one of the most prevalent greenhouse gases that trap heat within the Earth's atmosphere.

    Full Answer >
    Filed Under:

Explore