Scientists are looking at ways to 1 the global temperature by removing greenhouse gases from the air. Carbon dioxide has a 2 effect on the Earth"s temperature. Since the industrial revolution, humans have been burning 3 amounts of fossil fuels, releasing large amounts of carbon dioxide. The gas is changing the climate, warming the 4 for plants and animals and raising sea 5 . Even if we stopped burning fossil fuels today, there is enough carbon dioxide in the atmosphere. Hence, we have the idea of finding ways of 6 carbon dioxide.
In recent years there have been 7 to remove the carbon dioxide from its 8 in power plants. 9 have been fitted to the 10 , so the carbon dioxide produced during fuel burning can be removed from the 11 emissions. The carbon dioxide can be cooled and pumped for 12 in underground rock chambers, which is a useful way of preventing carbon dioxide from entering the 13 . But what about the 14 that is already out there The problem with removing carbon dioxide from the atmosphere is that it"s 15 at such a 16 concentration. Removing the gas takes lots of energy. Though it is expensive, it"s 17 . Extracting the 18 of carbon dioxide in the atmosphere would require enormous volumes of 19 to be processed. Therefore, most scientists have 20 at the idea.