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प्रश्न
What are the different ways in which water gets contaminated?
उत्तर
Water gets contaminated by the addition of:
Agricultural chemicals: Farmers use excessive amounts of pesticides and fertilizers to increase crop production. These chemicals get carried away to the water bodies due to rains and floods which lead to water pollution.
Industrial wastes: Industries release harmful chemical wastes into water sources, thereby polluting them
Sewage wastes: Waste materials from kitchens, toilets, and laundry sources are also responsible for contaminating water.
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संबंधित प्रश्न
The activities of man had adverse effects on all forms of living organisms in the biosphere. Unlimited exploitation of nature by man disturbed the delicate ecological balance between the living and non-living components of the biosphere. The unfavourable conditions created by man himself threatened the survival not only of himself but also of the entire living organisms on the mother earth. One of your classmates is an active member of 'Eco club' of your school which is creating environmental awareness amongst the school students, spreading the same in the society and also working hard for preventing environmental degradation of the surroundings
List two values exhibited by your classmate who is an active member of Eco-club of your school.
List two items which can be easily recycled, but we generally throw them in the dust-bins.
Why is forest considered a natural ecosystem?
The three R's which can help us to conserve natural resources for long term use are ______
The use of one of the following is eco-friendly. This one is :
(a) cars for transportation
(b) polybags for shopping
(c) windmills for generating power
(d) dyes for colouring clothes
In a village, farmers started cultivating crops all around a lake which was always filled with water. They added lot of materials W to the soil in their fields to increase the yield of crops. Soon they found that the whole surface of water in the lake was covered with a green layer made up of tiny organisms X. After some time, the fish present in the lake started dying in large numbers because they could not get sufficient Y due to a process Z which had occurred in lake water and drained out all the Y present in the water of lake.
(a) What do you think materials W are?
(b) Name (i) X, and (ii) Y.
(c) What is the process Z known as?
(d) What happens during the process Z which uses up all the Y present in lake water?
(e) What does this example tell us about the use of materials like W?
Suggest some approaches towards the conservation of forests.
Which plan has been started by the government to control the pollution of Ganga?
The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?
Expand the abbreviation GAP
