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Answered 2011-06-11 07:41:58

Animals, including man, add carbon dioxide to the atmosphere by breathing it out, and by decomposing, when dead. Man also adds CO2 to the atmosphere by burning fossil fuels (coal, oil and natural gas), and by destroying forests.

If there were no animals, including man, then the trees and other vegetation would grow again, with little to destroy them. Trees would absorb and store carbon, and the levels of carbon dioxide in the atmosphere would come down again to more like what they were like before the Industrial Revolution.

A:If there were no animals on earth all of the plants would die because plants need to take in carbon dioxide to live and produce oxygen for animals so all of the plants would die.
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How do animals return carbon dioxide to the atmosphere?

Animals return carbon dioxide to the atmosphere by breathing.


What would happen to the carbon dioxide if there were no animals?

Levels of carbon dioxide would continue to build up in the atmosphere. Animals are part of the carbon cycle. They take in and release carbon dioxide, but they don't affect the overall amount.


Effects of increase and decrease of carbon dioxide in the atmosphere?

An increase in carbon dioxide in the atmosphere results in an increased amount of carbon dioxide in the atmosphere. A decrease usually results in a decreased concentration of carbon dioxide in the atmosphere


Would a forest fire affect the amount of carbon dioxide in the atmosphere?

Forest fires increase the amount of carbon dioxide in the atmosphere


What decreases the amount of carbon dioxide in the atmosphere?

Photosynthesis, the process by which plants make food, decreases the amount of carbon dioxide in the atmosphere as the carbon dioxide is absorbed to release oxygen as the byproduct. So afforestation and reforestation will reduce carbon dioxide in the atmosphere.


Why does the amount of carbon dioxide in the atmosphere remain constant?

In the absence of human activities, the amount of carbon dioxide (CO2) in the atmosphere remains relatively constant because of what is known as the carbon cycle. Animals breathe out carbon dioxide, but plants absorb carbon dioxide and convert it into living matter, which animals eat, convert back into carbon dioxide and breathe out. This balance is only upset when carbon is extracted from under the ground and converted into carbon dioxide, thus raising the atmospheric concentration.


How do humans contribute to the amount of atmospheric carbon dioxide?

Humans contribute to the amount of carbon dioxide in the atmosphere through deforestation and the burning of fossil fuels. Burning any carbon releases carbon dioxide into the atmosphere. Trees remove carbon dioxide from the atmosphere through photosynthesis.


What part do animals play in the carbon dioxide cycle?

Animals convert oxygen into carbon dioxide and exhale it into the atmosphere.


Why does earth's atmosphere contain small amounts of carbon dioxide?

The earth's atmosphere contains a small amount of carbon dioxide because of the amount of plants and bacteria which photosynthesise. The atmosphere used to be mainly carbon dioxiide until bacteria first evolved. When the bacteria evolved it photosynthesised, producing oxygen and taking in carbon dioxide, make the composition of the atmosphere change. Furthermore, the carbon dioxide dissolves in oceans, is used to form sedimentary rocks and animals and shells are carbon based. Fossil fuels are also carbon based. All of this uses up the carbon dioxide, so there is only a small amount in the atmosphere.


What atmosphere contains a large amount of carbon Dixie?

Assuming you mean "carbon dioxide", the atmosphere of Venus is made up mainly of carbon dioxide.


How does carbon dioxide returns back to the atmosphere?

Carbon dioxide is returned back to the atmosphere by respiration, the decomposition of plants and animals and combustion.


Why do carbon dioxide levels not fluctuate daily in earths atmosphere?

This is because there is a balance between animals which are producers of carbon dioxide and plants which consumes carbon dioxide. Again plants also reduces the amount of carbon dioxide during respiration over the night


What do climate scientists believe is increasing the amount of carbon dioxide in the atmosphere?

Climate scientists believe that burning fossil fuel is increasing the amount of carbon dioxide in the atmosphere.


What are the main sources of carbon dioxide in the atmosphere?

The burning of fossil fuels releases the carbon dioxide removed from the atmosphere hundreds of millions of years ago. Other carbon dioxide sources include volcanoes, bush fires, . The decaying of dead plants and animals also releases carbon dioxide and methane. Carbon dioxide is released by cellular respiration in plants (at night) and from all living animals. The production of waste CO2 by microscopic animals in the ocean is a substantial amount.


What are some of the natural sourses of carbon dioxide in the atmosphere?

Animals and humans produce carbon dioxide naturally.


When dead animals decompose what is released into the atmosphere?

Carbon dioxide is released into the atmosphere.


How does carbon dioxide go back to the atmosphere?

Carbon dioxide goes back to the atmosphere through respiration, the decomposition of plants and animals, and combustion.


What gas do animals produce that puts carbon back into the atmosphere?

Carbon Dioxide


How would the amount of carbon dioxide and oxygen in the atmosphere change if there were no animals?

If there were no animals on this planet that would cause a decrease in the levels of carbon-dioxide with a simultaneous increase in the levels of oxygen due to the photosynthesis.That would slowly cause a shortage of carbon dioxide leading to the extinction of plant kingdom finally leaving the atmosphere devoid of co2


Which increases the amount of carbon dioxide in the atmosphere acting as a carbon force?

Respiration


Which increases the amount of carbon dioxide in the atmosphere acting as a carbon source?

Respiration :)


How do plants and animals help to maintain a balance of carbon dioxide in the atmosphere?

Plants and animals help to maintain a balance of carbon dioxide in the atmosphere by cellular respiration and photosynthesis. Photosynthesis releases oxygen and cellular respiration releases carbon dioxide.


How do plants and animals mantain the level of oxygen in the atmosphere?

plants produce oxygen from carbon dioxide and animals produce carbon dioxide from oxygen.


What planet with the greatest amount of carbon dioxide in its atmosphere?

earth


How would the amount of carbon dioxide in the atmosphere change if there was no plants?

If plants don't have carbon dioxide to produce food, the cells of plants and animals break down food to produce energy, they give off carbon dioxide as a waste product.