Question

B. Fill in the blanks.

1. The substances that bring the undesirable changes in water are called _________.
2. _________ and _________
are used by farmers for better yield and to protect
crops from insects and bacteria.
3. Sewers are normally made of _________ or ___________.
4.
_________ can be used as an organic fertiliser.
5. The method in which solid organic wastes are subjected to combustion is called __________.​

Answer 1

Answer:

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Explanation:

1. The substances that bring the undesirable changes in water are called __waterpollutants_______.

2.__Pesticides_______and_Insecticide_____are used by farmers for better yield and to protect crops from insects and bacteria.

3. Sewers are normally made of ___cements______ or __clay_________.

4.____Manure_____ can be used as an organic fertiliser.

5. The method in which solid organic wastes are subjected to combustion is called _Incineration_________.

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Answer 2

Answer:

1.pollutants

2.pesticides and fertilizers

3.vitrified clay and asbestos cement

4.manure

5.incineration