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pescribe environmental friendly methods t, waste,, j, In recent years, an alternar, rl, Wiha sic é late and better method is used. to obtain energy from not, aste but also fiom huma an wast i ae, an waste,, , 2. This is by anaerobic ferment, as fuel., , 3. As this gas is produced from biological waste, this is c, , 4, Biogas is a mixture of, several gases : meth, ane, carbondioxide and small amounts of, hydrogen, nitrogen and hydrogen sulphide., , ‘0 profi , ;, profitably dispose of human waste and cattle, , ation ‘, of the wastes to produce a gas which can be used, , alled biogas., , at steps can ', Wh P: be taken to reduce pollution due to particulate matter from industries 7, , Ns Indus i lw Ca be treat i 1em a, tria astes n at ed physicall cl i i i i, les S hazardous. y, T ically and biologic lly until they are, , D. = aa wastes should be first metalized the insoluble material if, ae able should be allowed to degr ade under controlled conditions before being, , 3. Electrostatic precipitators are used to reduce the particulate matter in the factory, __ smoke. f, , What is a medical waste ? Why is it called hazardous waste ? What is the safe way to dispose, medical waste ? ;, , 1. Waste that is produced from hospitals is known as medical waste., , 2. Medical waste include needles, syringes, saline bottles, instruments used in surgeries,, bandages soaked with blood and pus, used medicines, human excreta, etc., , 3: Medical waste Is called hazardous waste because it containing toxic substances., 4. Burying the wih waste in locations situated away from residential areas is the, simplest method to dispose medical waste., , unds;, verse, , 6 What farm practices impact soil ? Do they impact soil in a positive or a negative way?, “1. Indiscriminate use of fertilizers, pesticides, insecticides, herbicides, no-till farming, and growing same crop in all seasons are the farm practices impact soil., 2. These farm practices may show positive or negative impact on the soil., 3, By using chemical fertilizers we can get high yielding for only 20 to 30 years., 4. After that soil becomes reluctant to plant growth. These chemicals damage fertility., 5. Due to the extensive use of pesticides, insecticides, herbicides the salinity of the soil, , increases and it is not suitable for growing crops., 6. No-till farming is a way of growing crops without disturbing the soil through tillage., 7. Tillage activity can lead to compaction o, native vegetation and death of the organisms in the soil., , f sail, loss of reanls matter in soil, loss of, , easons dec eases the fertility., , , , 8. Growing the same crop in alls, Cee aU