They know because they can work out what percentages of which gas were around through ice samples taken from Antarctica
Carbon dioxide helps the greenhouse in one way. Plants in the greenhouse needs carbon dioxide to grow.
Volcanoes, like the burning of fossil fuels, are also a source of the primary greenhouse gas, carbon dioxide.
The chemical name of a greenhouse gas that contains carbon and oxygen is carbon dioxide.
Carbon dioxide as we know is a greenhouse gas. It causes greenhouse effect. That effect causes depletion of ozone.
No. The greenhouse effect keeps the earth warm. Extra carbon dioxide added to it is causing global warming.
Scientists believe that global warming is happening to the earth because of the greenhouse effect and carbon dioxide pollution in the atmosphere.
... the burning of fossil fuels, which is adding extra carbon dioxide to the greenhouse gases in the atmosphere.
Carbon dioxide is the main greenhouse gas. It also causes global warming.
Carbon dioxide helps the greenhouse in one way. Plants in the greenhouse needs carbon dioxide to grow.
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.
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.
Volcanoes, like the burning of fossil fuels, are also a source of the primary greenhouse gas, carbon dioxide.
The greenhouse effect occurs when certain gasses in the atmosphere trap infrared radiation. This effect makes the planet warmer than it would be without a greenhouse effect.The greenhouse effect is caused by greenhouse gases; the most important greenhouse gasses in Earth's atmosphere are: water vapor, carbon dioxide, and methane.Recently, the greenhouse effect has gotten stronger. Scientists believe this is because humans have been using large amounts of fossil fuels, which release carbon dioxide when they are burned. Since carbon dioxide is a greenhouse gas, it has caused the planet to warm over the past 150 years.
Greenhouse gas.
Carbon dioxide
Carbon dioxide, from the burning of coal, oil and natural gas, the fossil fuels.
Carbon dioxide is known as a greenhouse gas which cause global warming.