how does carbon help us?
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Carbon exists in all organic organisms and forms the basis for all life on Earth.  Carbon is the key element in the carbon cycle, which includes among other things, carbon dioxide, a necessary greenhouse gas.  Excess carbon dioxide in the atmosphere is thought to contribute to global warming.
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They are attracted to the carbon dioxide we breathe out.
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Vitamin C definately helps.
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you get more air from the trees, it takes away carbon dioxide, and it protects the ozone from further damage.
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As more and more forest are destroyed, fewer plants are left to take in carbon dioxide for use in photosynthesis. On the other hand, people keep on using energy and fuel and burning materials that produce more and more carbon dioxide. There is therefore a surplus of carbon dioxide in the air. You have to remember that carbon dioxide is one of the major green house gases in the atmosphere. These gases warm our atmosphere by converting solar infrared radiation into heat energy. What's more, the heat is also trapped by these green house gase. With more and more heat being trapped, our climate will change. Higher global temperature will coz the sea level to rise. It will also coz extreme weather conditions such as supertyphoons and tornadoes
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In photosynthesis, plants convert light into chemical energy. This energy is thus used to turn carbon dioxide into carbohydrate releasing oxygen as a byproduct. That is why many plans to fix global warming such as the Kyoto Protocol aim to increase the number of forested areas through so-called carbon sinks.
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You can reduce the amount of carbon dioxide you are responisble for (your carbon footprint) by:\n- cutting down on car journeys and using the bus\n- change electricity supplier to one who only uses renewable sources\n- generate your own energy by having wind turbine or solar panels, or both!\n\nBy planting trees you are helping to reduce the amount of carbon dioxide in the atmosphere.\n\nYou should use eco-friendly washing products without the harmful chemicals.\n\nMake sure your food is as local as possible, you could try farmers markets.\n\nThere are countless things you could do to be more green.
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Water and Carbon dioxide. With the help of an enzyme called carbonic anhydrase.
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CO2. and you can also use vinegar.
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CO2 emmisions really impact the carbon cycle in nature.\n\nIn the human body, it is influenced by smoking, poor diet, exercise, etc.
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--Humans cut down forests and woodlands and plough the soil for agricultural purposes to produce more food. This decreases photosynthesis and there is less utilization of CO2 and so the atmospheric CO2 increases in concentration, hence disturbing the carbon cycle and leading to global warming.\n--Due to the increasing human population, more vehicles are now in use and the car exhaust release more of pollutant gases including CO2, and so the concentration of CO2 in air increases.\n--Excessive combustion of fossil fuels also release CO2 in the atmosphere and increase its concentration. This leads to global warming which has the following effects: (1) Melting of polar ice caps due to increased temperature, resulting in floods. (2) Evaporation of water from water bodies, altering the rainfall pattern and climatic conditions. (3) More evaporation of water from the soil, leading to drought and famine.\nHowever, and increase in temperature increases the rate of photosynthesis. Hence more of 02 is evolved and the cycle can be brought back to normal.
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Here is the basic information including some alchemy (second two references).  Carbon is so old in human time that its history will never really be known.
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Carbon in its hardest form
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because if we use up and burn up all that carbon (wood), it will further global warming.\n\nbecause our atmosphere needs the oxygen it produces. and trees fight air pollution.\n\nbecause the people who live there depend upon the forest for their livelihoods.\n\nbecause it has more intrinsic value if it is there instead of a clearcut.\n\nbecause there are many plants in the forest that can be used to make drugs to cure diseases, like a cure for cancer.\n\nbecause without the ecosystem, all kinds of animals and plants will go extinct. \n\nbecause it is morally wrong.
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Carbon is a remarkable element for many reasons. Its different forms include one of the softest (graphite) and one of the hardest (diamond) substances known. Moreover, it has a great affinity for bonding with other small atoms, including other carbon atoms, and its small size makes it capable of forming multiple bonds. Because of these properties, carbon is known to form nearly ten million different compounds, the large majority of all chemical compounds. Carbon compounds form the basis of all life on Earth and the carbon-nitrogen cycle provides some of the energy produced by the sun and other stars. Moreover, carbon has the highest melting/sublimation point of all elements. At atmospheric pressure it has no actual melting point as its triple point is at 10 MPa (100 bar) so it sublimates above 4000 K. Thus it remains solid at higher temperatures than the highest melting point metals like tungsten or rhenium, regardless of its allotropic form.\n\nCarbon was not created in the Big Bang due to the fact that it needs a triple collision of alpha particles (helium nuclei) to be produced. The universe initially expanded and cooled too fast for that to be possible. It is produced, however, in the interior of stars in the horizontal branch, where stars transform a helium core into carbon by means of the triple-alpha process. It was also created in a multi atomic state
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All of them.  All trees give off oxygen and absorb carbon dioxide, so they help repair the balance of the air that humans use.  If we have enough trees, we keep the air the same for long periods of time.  Also, most trees are good for wood, lots of them are good for their berries, nuts, or fruits, and all of them offer shade and improve the view.
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all, because they produce oxygen and absorb carbon dioxide. some are very beneficial though, like certain herbs that can be used as remedies.