Humans are part of the natural environment and breathe carbon dioxide, a naturally occurring greenhouse gas. However, plants absorb this gas and are, in turn, eaten by humans. As long as this natural cycle remained in balance, there was no problem and the atmospheric concentration of carbon dioxide remained in the range of 260 to 280 parts per million (ppm) over the period of human existence, dropping to around 180ppm during the Ice Ages.
Human activities can add carbon dioxide and other greenhouse gases that are not part of the natural cycle, thereby increasing their concentration in the atmosphere. In fact, the atmospheric concentration of carbon dioxide has increased by about 35 per cent, to over 380 ppm, since the Industrial Revolution. The main cause of this increase is the burning of fossil fuels such as coal, oil and natural gas. Thus activities such as driving motor vehicles and generating thermal electricity are what release additional greenhouse gases. The manufacture of cement is another important contributor, as is deforestation.
Cattle and sheep farming are also important contributors, since cattle and sheep produce methane, a potent greenhouse gas, when they belch. Methane is twenty times more potent as a greenhouse gas than carbon dioxide.
Volcanic eruption and animal respiration.
No, as well as the geosphere, the carbon cycle also moves carbon between the atmosphere, the biosphere, and the hydrosphere.
If humans continue doing nothing to reduce their impact on the carbon cycle then the levels of carbon dioxide in the atmosphere will continue to rise.
Respiration.. I think
photosynthesis, where plants use the carbon in the form of CO2, water and sunlight as a heat source to produce fructose and glucose to feed the plant.
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Volcanic eruption and animal respiration.
Dead trees rotting in the forest.Carbon dioxide escaping from volcanoes.
carbon dioxide
The carbon cycle is a process by which carbon is cycled between the atmosphere, land, water and organisms. Carbon enters a short-term cycle in an ecosystem when producers, such as plants, convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis.The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth
Carbon dioxide gas.
Driving vehicles that run on fossil fuel. Burning oil releases carbon dioxide.Using electricity. Most electricity is now generated by burning fossil fuels. This burning emits carbon dioxide.
Carbon monoxide is first produced by either human activities involving combustion or a variety of natural processes. From there on, it reacts with oxygen/hydrogen radicals in the atmosphere and become carbon dioxide. The fact that most carbon monoxide will become carbon dioxide when left in the atmosphere long enough can help explain why the carbon monoxide cycle is not taught in school.
No, as well as the geosphere, the carbon cycle also moves carbon between the atmosphere, the biosphere, and the hydrosphere.
Carbon Cycle.
It is not fixed in the atmosphere. It moves as part of the carbon cycle in and out of the oceans, the atmosphere and the land.
More generation of radiocarbon through detonation of nuclear weaponry-->circulation in the atmosphere of radioactive neutrons, which react with atmospheric 14-nitrogen to form 14-carbon.