List one major harmful effect of the following:
i.Rivers contaminated with sewage.
ii.Too much gaseous exhausts containing $C O_{2}$ and $S O_{2}$ .
iii. Pesticides such as DDT are used in agriculture.
iv. Prolonged noise such as the one produced by crackers throughout the night.

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Solution

i. Sewage disposed of into rivers cause diseases such as diarrhoea, dysentery, cholera, typhoid, and jaundice.
ii. If the concentration of CO $_{2}$ and SO $_{2}$ is higher from the exhausts can cause global warming and affects the lungs.
iii. Pesticides such as DDT can affect non-target organisms in the farms and increase the risk of biomagnification.
iv. Prolonged loud noise from firecrackers can also cause high blood pressure, heart disease, sleep disturbances, and stress. These health problems can affect all age groups, especially children.

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List one major harmful effect of the following:i.Rivers contaminated with sewage.ii.Too much gaseous exhausts containing CO2 and SO2.iii. Pesticides such as DDT are used in agriculture.iv. Prolonged noise such as the one produced by crackers throughout the night.

List one major harmful effect of the following:
i.Rivers contaminated with sewage.
ii.Too much gaseous exhausts containing $C O_{2}$ and $S O_{2}$ .
iii. Pesticides such as DDT are used in agriculture.
iv. Prolonged noise such as the one produced by crackers throughout the night.