Answer:
Explanation:
Wind, solar and hydroelectric systems generate electricity with no associated air pollution emissions. Geothermal and biomass systems emit some air pollutants, through total air emissions are generally much lower than those of coal and natural gas fired power plants.
1.Take breaks
2.Use keywords to refocus yourself
3.Take good notes in class
4.Rewrite your notes at home
5.And Make things interested
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The smallest unit of matter
You can teach the subject you want it is up to you
