Answer:
The correct answer is statement b.
Explanation:
A stable elevation in the surface temperature of the Earth was observed around the 1970s that brought the concern of climate change into focus. One of the prime influence of climate change is that it leads to global warming.
Global warming is associated with greenhouse gases that trap heat on the surface of the Earth and lead to warming up of the surfaces. This can cause melting of ice in the Polar Regions, and thus increase the volume of water in the oceans.
The global warming concern replaced the concern for the global cooling because the scientist observed that the steady surface temperature was increasing between 1970 and 1990.
Further Explanation:
Global warming is the main concern for the Earth and the living system surviving on this Earth. Due many factors the Earth temperature is increasing more than the normal increment. The factors that cause the global warming are the release of high amount of gases like methane, carbon dioxide and chlorofluorocarbon that enhances the atmosphere temperature. These gases trap the heat and causes increment in the temperature of the Earth.
Global warming leads to melting of glaciers, occurrence of severe draught, rise in the sea level and ultimately disruption of habitats. The global warming can be reduced by reducing the carbon footprint.
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Answer Details:
Grade: High school
Chapter: Environment study
Subject: Biology
Keywords:
Global warming, living system, Earth, temperature, methane, carbon dioxide, chlorofluorocarbon, atmosphere, draught, habitats, carbon footprint.
