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harnessing energy through chemistry our last source of power how water power is produced the amount of solar energy that can be utilized
only a very small part is available the sun is too distant from the earth it takes thousands of years for this energy to be stored up in coal and oil our scientific knowledge is not sufficient
Even windmill' s action depends on the sun. The sun produces enormous energy for man to make use of. Some day man will be able to utilize 100 % of the solar energy that gets to the earth. The sun produces different heating effects in different places.
100 % but indirectly 5 % 50 % only a very tiny amount
a machine using solar energy efficiently has already been developed the sun is our final source of power man uses only a tiny part of the sun's energy the part of the sun's energy we use is used indirectly
Water energy Electrical energy Chemical energy Heat energy
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