9. Write a brief note on Global warming.
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Answer:
Global warming is a slow and steady rise in Earth's surface temperature.[1][2] Temperatures today are 0.74 °C (1.33 °F) higher than 150 years ago.[3] Many scientists say that in the next 100–200 years, temperatures might be up to 6 °C (11 °F) higher than they were before the effects of global warming were discovered. Most noticeable changes by this increase in temperature is the melting of ice caps all around the world. Sea level is rising steadily as a result from continental ice melting into the sea. As a prediction, many cities are soon to be partially submerged in the ocean. Consequently, many part of the world have a major increase in temperature.
Among the Greenhouse gases, the concentration and increase of carbon dioxide in the atmosphere appears to be the main cause of global warming, as predicted by Svante Arrhenius a hundred years ago, confirming the work of Joseph Fourier more than 200 years ago. When people use fossil fuels like coal and oil, this adds carbon dioxide in the air.[4] When people cut down many trees (deforestation), this means less carbon dioxide is taken out of the atmosphere by those plants.
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Mark BRAINLIEST