Concept explainers
Interpretation:
The greenhouse effect should be explained. The reason for certain level of greenhouse gases to be beneficial but too high level to be dangerous should be explained. The most common greenhouse gas should be identified.
Concept Introduction:
Global warming is an urgent issue that is caused by heat trapping greenhouses gases building up in atmosphere because of increased human activities. Major sources of artificial greenhouse gas sources are cars, power plants and industrial burning of fossil fuels such as coal. The current consequences of this increased greenhouse gas content are melting of the glaciers, altering of weather patterns, warming up of seas and oceans.
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