Strom:
Strom in winter is darn from the energy of two air of uncommon temp and moisture. It regularly forms from the air of mass dry and cold region. The point wherever these two air masses meet is called a front. The cold air push the warm air in advance it forms cold front. The same is vise versa for warm front.
Acid rain:
Acid rain is a type of rain when snow is polluted by acid in the atmosphere and damage environment. Sulphur dioxide and nitrogen oxide are two compounds pollute and form acidify rain. These two compounds mingled with atmosphere and reach the earth as acid rain.
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