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, that is formed during respiration, combustion, and organic decomposition, is an essential component in photosynthesis, and is used in food refrigeration, carbonated beverages, inert atmospheres, fire extinguishers, and aerosols. (Elements & Compounds) a colourless odourless incombustible gas present in the atmosphere and formed during respiration, the decomposition and combustion of organic compounds, and in the reaction of acids with carbonates: used in carbonated drinks, fire extinguishers, and as dry ice for refrigeration. Also called: carbonic-acid gas , that is present in the atmosphere and is formed when any fuel containing carbon is burned.

It is breathed out of an animal's lungs during respiration, produced by the decay of organic matter, and used by plants in photosynthesis.

They are then able to calibrate the carbon dating method to produce fairly accurate results.

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[tags: environment, clean biofuel, oxygen] - Climate change or colloquially known as global warming, now pose a new threat to civilization as the levels of greenhouse gases (GHG) are soaring to new levels.The most significant contributor to greenhouse gasses would be Carbon Dioxide (Co2).The levels of Carbon Dioxide (Co2) gas have risen to levels civilization has not seen before.Highly polluted areas, such as the Los Angeles area, pose a threat to the elderly, children, and people suffering with COPD (Chronic Obstructive Pulmonary Disease) (“People at Risk,” 2013).Algae can be used to harness the carbon dioxide, nitrogen, make oxygen and be refined for biofuel.- INTRODUCTION The level of carbon dioxide has increased tremendously over the past few years by nearly 40%, that is from approximately 280ppm in preindustrial times to 384ppm in 2007(Solomon 2007).Nearly one third of anthropogenic carbon dioxide is being absorbed by the oceans today(Science Daily, May 24, 2008) . Furthermore, the ratio is known to fluctuate significantly over relatively short periods of time (e.g. Unfortunately the ratio of carbon-12 to carbon-14 has yet to reach a state of equilibrium in our atmosphere; there is more carbon-14 in the air today than there was thousands of years ago.Radioactive carbon (Carbon 14) is formed in the upper atmosphere as a byproduct of cosmic radiation.Cosmic rays are positively charged atoms moving at enormous speeds.