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They know because they can work out what percentages of which gas were around through ice samples taken from Antarctica

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What do scientists believe is happening to the earth because of the greenhouse effect and pollution?

Scientists believe that global warming is happening to the earth because of the greenhouse effect and carbon dioxide pollution in the atmosphere.


What is carbon dioxide in the greenhouse effect?

Carbon dioxide is the main greenhouse gas. It also causes global warming.


How is cabron dixiode related to the greenhouse effect?

Carbon dioxide helps the greenhouse in one way. Plants in the greenhouse needs carbon dioxide to grow.


What do scientists suggest is the reason for global warming?

Burning fossil fuels adds extra carbon dioxide to the greenhouse gases in the atmosphere.Deforestation removes forests that used to take carbon dioxide from the atmosphere.


How do scientists think that increased carbon dioxide levels contribute to global warming?

Carbon dioxide is a greenhouse gas. Greenhouse gases capture and retain the sun's heat. Increased carbon dioxide levels mean that more and more of this heat is retained. This is warming the earth and the atmosphere all round the world - global warming.


What organism are scientists using to eat carbon dioxide?

Scientists are using certain species of bacteria and algae to consume carbon dioxide as part of a process called carbon capture and storage (CCS). These organisms use the carbon dioxide as a source of food for growth, helping to reduce the concentration of this greenhouse gas in the atmosphere.


Scientists who are concerned about increased carbon dioxide in the atmosphere believe global warming is caused by?

... the burning of fossil fuels, which is adding extra carbon dioxide to the greenhouse gases in the atmosphere.


Is a greenhouse gas that traps heat in the atmosphere?

Carbon dioxide is a greenhouse gas that traps heat in the atmosphere.


Why are studies of volcanoes helpful to scientists who wish to understand the greenhouse effect?

Volcanoes, like the burning of fossil fuels, are also a source of the primary greenhouse gas, carbon dioxide.


What greenhouse gas do scientists believe has increased due to pollution?

Carbon dioxide, from the burning of coal, oil and natural gas, the fossil fuels.


Does carbon dioxide increase the greenhouse effect?

Yes, carbon dioxide is a greenhouse gas that contributes to the greenhouse effect. Excess carbon dioxide in the atmosphere traps heat from the Earth's surface, leading to a warming effect known as global warming.


What is carbon dioxide known as?

Greenhouse gas.