Advertisements
Advertisements
प्रश्न
The main cause for abundant coliform bacteria in the river Ganga is
विकल्प
disposal of unburnt corpses into water
discharge of effluents from electroplating industries
washing of clothes
immersion of ashes
उत्तर
disposal of unburnt corpses into water
Explanation -
Coliform is a group of bacteria present in human excreta. Thus, the disposal of unburnt corpses into water is the main source of this group of bacteria in the river Ganga.
APPEARS IN
संबंधित प्रश्न
Out of the two-reuse and recycle-which, in your opinion, is better to practise? Give reason.
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.
State the importance of green and blue dust-bins in the safe disposal of the household waste
What are the different ways in which water gets contaminated?
What measures would you take to conserve electricity in your house?
What is a natural resource? Name three important natural resources.
The Chipko Andolan is associated with :
(a) Tigers
(b) Turtles
(c) Trees
(d) Tomatoes
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.
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.
