1. how do empty bottles, fruit peelings, old newspaper, become useful ? how do they become harmful ?
2. how can you maximize the use or useful materials that you have identified?
3. how can you minimize the hazard of harmful materials ?
2. how can you maximize the use or useful materials that you have identified?
3. how can you minimize the hazard of harmful materials ?
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Answer:
1.plastic bottles can be useful because it ca nbe recycled to other materials,but it can be harmful when someone burns it fruit peelings and old newspapers can be useful be cause they decay to soil and adds more nutrients in the soil.
2.By practicing the 3R's in waste management.
Explanation: For example the plastic bottle can recycled into a plant pot, the fruits peelings can use as compost for plants, and the old newspaper can be sold to junk shops so you will earn from it.
3.To prevent exposure to a toxic material, control measures are used. Ventilation is a very common control measure for toxic materials. Well-designed and well-maintained ventilation systems remove toxic vapours, fumes, mists or airborne dusts from the workplace before workers are exposed.