Select the most appropriate definition of lsquo Global Dimming rsquo a phenomenon often seen in news...........

Geography (CDS) Envirnment and Climate Change

Select the most appropriate definition of ‘Global Dimming’ a phenomenon often seen in news:

It refers to the collective efforts of G20 countries to reduce the global carbon footprint.

It is an initiative of the UNEP aimed at reducing the urban heat island effect by propagating dim colours for high rises in urban areas.

It is a drop in the amount of average solar energy reaching the earth’s surface due to a shield created by suspended air particulate materials.

An initiative of the UNFCCC, to reduce global burning of fossil fuels and shift to cleaner sources of energy.

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Explanation:

Correct Option: (c) Explanation: Option (c) is correct Supplementary Notes Global Dimming Along with the phenomenon of global warming, global dimming is also a consequence of climate change and changing atmospheric phenomenon. An English scientist, Gerald Stanhill, during 1985, fi rst noticed a 22% drop in sunlight in Israel as compared to his fi ndings in 1950. He termed it as global dimming. It is the drop in the amount of average solar energy reaching the Earth’s surface due to shielding caused by suspended air particulate materials. Air polluting particles seeded water vapour in the cloud are the major cause behind global dimming. Global dimming can have some very devastating impacts on us. The drought in Sub-Saharan Africa during 1970s and 1980s is considered to be caused by global dimming. Because, cloudy regions can adversely affect crop ripening, water bodies, oxygen production and global rainfall patterns.