Pollution In Water
Pollution In Water
Fresh Water Pollution: Pollution of rivers,steams, ponds and lakes is mainly caused by the discharge of the following:
Industrial Waste Materials: These mainly come from factories. There is a wide variety of this waste,for example: cyanides; compounds of mercury, copper, and lead. These are poisonous to aquatic animals and plants. These persistent poisons accumulate in the bodies of aquatic animals, such as fish, and the animals, which feed on them, such as water birds. These poisons also affect humans when they eat the Pollution of rivers, steams, ponds and lakes is mainly caused by the discharge of the following: affected fish.
Untreated Sewage: In the efficient sewage treatment works, the efluent is made harmless before being discharged, but if the works become overloaded or fail to function properly, untreated sewage is released. Such sewage may contain human pathogens. It may also lead to eutrophication.
Eutrophication: Eutrophication is a condition caused by a sudden increase in the amount of nutrients in a lake or pond. The effects on the lake and its flora and fauna are as follows: There is a sudden increase in the rate of growth of the green plants (mainly algae). They quickly form a dense mat covering the surface of the lake. When the algae complete their life cycle and begin to die, aerobic decomposers become very active; they soon use up all the available oxygen in the water, so most of the fauna, including hsh, die from lack of oxYgen. Usually there is not enough oxygen for the bacteria to complete the decomposition of the algae. The semi-decomposed remains of the algae sink to the bottom of the lake, where they form an oxygen-deficient mud. Even if no further pollution occurs, the lake may take several years to recover to the stage where animals like fish can live in it again.
Agricultural Waste Materials: When fertilisers, insecticides, or pesticides are used in large amounts, the excess may drain into neighbouring fresh water. Insecticides and pesticides can kill aquatic animals. Usage of fertilisers can cause eutrophication.
Sea-Water Pollution: Oil is the main pollutant of the sea and seashore. Oil often escapes when oil tankers are loaded and unloaded, and may release in large quantities when an oil tanker is wrecked. Oil causes the death of sea birds; either by poisoning them or by making their feathers stick together and making them unable to fly. When washed up on shore, oil also kills most of the plants and animals living there. Large amounts of untreated sewage, which may contain human pathogens, are also discharged daily round the coasts. This again is a source of pollution.
Students / Parents Reviews [20]
In terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Yogansh Nyasi
7thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
7thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
Sharandeep Singh
7thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
Barkha Arora
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
