30. (a) Define :
(i) Soil pollution
(ii) Soil Erosion
State any 3 factors which lead to soil pollution.
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a) I. Anything that causes contamination of soil and degrades soil quality is known as Soil polution.
2.The washing or blowing away of the top layer of soil is known as Soil erosion.
Three factors leading soil pollution--
1) Deforestation.
2) Acid rain.
3) Industrial waste.
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