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-56.6 °C (216.6 K) -69.9 °F (at 5.185 bar) -78.5 °C (194.7 K) -109.3 °F (sublimes) Carbon dioxide is used by plants during photosynthesis to make sugars which may either be consumed again in respiration or used as the raw material to produce polysaccharides such as starch and cellulose, proteins and the wide variety of other organic compounds required for plant growth and development. It is produced during respiration by plants, and by all animals, fungi and microorganisms that depend on living and decaying plants for food, either directly or indirectly. It is, therefore, a major component of the carbon cycle. Carbon dioxide is generated as a by-product of the combustion of fossil fuels or the burning of vegetable matter, among other chemical processes. Over very long time scales (thousands to millions of years), concentrations are influenced by emissions from volcanoes and other geothermal processes such as hot springs and geysers and by the dissolution of carbonates in crustal rocks. Carbon dioxide has no liquid state at pressures below 5.1 atm. At 1 atm it is a solid at temperatures below -78 °C. In its solid state, carbon dioxide is commonly called dry ice.
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Carbon Dioxide Subcategories
Carbon Dioxide Articles
Reduce Your Carbon Dioxide Emissions
by Michael Podlesny
Jan 04, 2009
You have heard that aged old saying, if you want something done you have to do it yourself. This could not be truer when it comes to global warming and the environment, especially carbon dioxide emissions.
Small life changes can be made righ...
The Power Of Learning To Breathe Properly
by Dr Edward Steiner
Mar 08, 2006
Did you know that breathing is the only essential bodily function performed unconsciously, that you can control consciously? Your body can go without food for months, water for weeks and yet your body can't go without oxygen for more than a few...
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