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Carbon Fixation

Carbon fixation is a process found in autotrophs (organisms that produce their own food), usually driven by photosynthesis, whereby carbon dioxide is changed into organic materials. Carbon fixation can also be carried out by the process of calcification in marine, calcifying organisms such as Emiliania huxleyi.

The Calvin Cycle is the most common method of carbon fixation.

In plants, there are three types of carbon fixation during photosynthesis:

C3 – a plant that uses the Calvin Cycle for the initial steps that incorporate CO2 into organic matter, forming a 3-carbon compound as the first stable intermediate. Most broadleaf plants and plants in the temperate zones are C3.

C4 – a plant that prefaces the Calvin Cycle with reactions that incorporate CO2 into 4-carbon compound. C4 plants have a distinctive leaf anatomy. This pathway is found mostly in hot regions with intense sunlight. Tropical grasses, such as sugar cane and maize are C4 plants, but there are many broadleaf plants that are C4.

CAM – plant that uses Crassulacean acid metabolism as an adaptation for arid conditions. CO2 entering the stomata during the night is converted into organic acids, which release CO2 for the Calvin Cycle during the day, when the stomate is closed. The jade plant (Crassula ovata) and Cactus species are typical of CAM plants.

{From wikipedia}

12 Responses to “Carbon Fixation”

  1. dwall says:

    Mitigating the impact of the carbon cycle over time is an admirable goal.

    Cap and trade is not the only way to accomplish the goal. Cap and trade will make more green millionaires, like Gore, and give more government control over our lives.

    We will not be leaving OIL, coal, NG for many years. Substitutes are not available without new technology.

    The Green revolution/AGW/Sustainability are globally expensive frauds and heavily subsidized by future taxpayers and are coming to an end soon. Van Jones, Gore, and friends will be sent back to productive endeavors, if they have ever had a job.

    Will be replaced by GREEN II based on sound economic concepts and rational use of physics. The extent of lib corruption of our University System is displayed in their complicity in the fraud.

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