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प्रश्न
What are the different ways in which water gets contaminated?
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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.
संबंधित प्रश्न
List two main causes of the pollution of water of the river Ganga. State how pollution and contamination of river water prove harmful for the health of the people of neighbouring areas.
Out of the two-reuse and recycle-which, in your opinion, is better to practise? Give reason.
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?
List five things you have done over the last one week to −
conserve our natural resources
Answer the following question.
Why should there be an equitable distribution of resources? List three forces that would be working against an equitable distribution of our resources.
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
