Question

Please tell answer
class 7
Geography chapter 5
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Answer 1

Answer:

water geography chapter 5

Answer 2

Answer:

1) Salt in the sea, or ocean salinity, is mainly caused by rain washing mineral ions from the land into water. Carbon dioxide in the air dissolves into rainwater, making it slightly acidic.

2) The main reason behind the water quality deteriorating is the use of excessive pesticides, insecticides, toxic and hazardous wastes, garbage and rubbish and decayed organic materials.