D.
Answer the following questions:
1. What is waste? Name three diseases caused by waste materials thrown
in open areas.
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Waste (or wastes) are unwanted or unusable materials. Waste is any substance which is discarded after primary use, or is worthless, defective and of no use. A by-product by contrast is a joint product of relatively minor economic value. A waste product may become a by-product, joint product or resource through an invention that raises a waste product's value above zero.
The three diseases caused by waste materials thrown in open areas are :-
1. Diarrhoea(From sewage waste)
2. Malaria and Dengue( Carriers of these diseases live near waste)
3. Lung infections, parasitic infections, and also AIDS.
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