Question

make presentation on the effect of increased carbon dioxide on global warming
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Answer 1

Answer:

The greenhouse gases responsible for global warming are not limited to carbon dioxide (CO2): scientists are also concerned about the large increase in methane in the atmosphere. Billions of tonnes of methane from organic decomposition are trapped in the Arctic subsoil, called permafrost. With global warming causing ice to melt, scientists are worried about the consequences of releasing this methane in the Arctic ice. Carbon dioxide, or CO2 and methane (CH4) are both greenhouse gases. The first remains in the atmosphere for nearly 200 years while the latter remains there only a dozen years. Methane is a powerful greenhouse gas that contributes to global warming: it has an impact on the greenhouse effect about 25 times more potent than carbon dioxide (CO2). Its global warming potential (GWP) is therefore 25, and it increases with time: it is estimated at 62 within 20 years. Methane emissions are increasing over time, particularly because of the reserves of methane trapped in the Arctic subsoil, called permafrost. Increasing temperatures accelerate the melting of ice, and scientists are concerned about the consequences of releasing this methane from the Arctic ice. CO2 emissions remain the most harmful to the climate due to their very high level, but other gases also act on the greenhouse effect: water vapor (H2O), nitrous oxide (N2O), nitrogen trifluoride (NF3)... and methane (CH4) in particular. As methane progresses, climate change accelerates. But scientists do not want to draw conclusions for now, since the phenomenon of methane is too recent to draw any "trend". At an equal quantity, methane is therefore more potent in greenhouse effect than CO2. But methane emissions are not as high as carbon dioxide emissions. To know which gas has the most impact on climate, scientists reason in "CO2 equivalent"; the effect of each gas is expressed as a function of the CO2 effect

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