Pollution of Air and Water - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Long Q&A:
Q1: Explain Ganga Action Plan.
View Answer
Ans:
The Ganga action plan was, launched by Sri Rajeev Gandhi, the then Prime Minister of India on 14 Jan. 1985 with the main objective of pollution abatement, to improve the water quality by Interception, Diversion and treatment of domestic sewage and present toxic and industrial chemical wastes from identified grossly polluting units entering in to the river. The other objectives of the Ganga Action Plan are as under.
Control of non-point pollution from agricultural runoff, human defecation, cattle wallowing and throwing of unburnt and half burnt bodies into the river.
Research and Development to conserve the biotic, diversity of the river to augment its productivity.
New technology of sewage treatment like Up-flow Anaerobic Sludge Blanket (UASB) and sewage treatment through afforestation has been successfully developed.
Rehabilitation of soft-shelled turtles for pollution abatement of river have been demonstrated and found useful.
Resource recovery options like production of methane for energy generation and use of aquaculture for revenue generation have been demonstrated.
To act as trend setter for taking up similar action plans in other grossly polluted stretches in other rivers.
Q2: Clear transparent water is always fit for drinking, do you agree?
View Answer
Ans:
No, clear and transparent water is not always fit for the purpose of drinking. There are possibilities of disease causing microbes and dissolved impurities in the clear and transparent water. So, it is important to purify water before drinking , water can be purified by using water purifiers, by chlorination and by boiling.
Q3: Explain air pollution and its harmful effects. Also list some important measures to reduce air pollution.
View Answer
Ans:
Air pollution cab be reduced by adopting following ways:
Reduce the use of car and other vehicles as these are the significant source of air pollution, so switching to a more gas-efficient vehicle will be a big help. Taking public transport to work rather than driving will reduces the number of carbon dioxide into the air. Using eco-friendly fuels in vehicles like CNG can also be beneficial.
Reduce Waste: Manufacturing of unnecessary or disposable goods often produces air pollution, so reduced purchasing of disposables will help. In general, follow the solid waste mantra - "Reduce, Reuse, Repair, And Recycle" - and this will reduce air pollution as well from transporting, treating, or disposing of unnecessary wastes.
Eliminate Toxic Chemical Use at Home --- A surprising number of household or home shop chemicals are toxic and volatile. Many release vapours into the air, inside the home and out. This can be serious health threat to your family, and contributes to community-wide levels of air pollutants.
Plant leafy trees and shrubs --- Deciduous trees and shrubs (the kinds that drop leaves in the fall) are excellent air filters to help reduce smog and cool the air on hot summer days.
Air pollution is a significant risk factor for multiple health conditions including respiratory infections, heart disease, and lung cancer. The health effects caused by air pollution may include difficulty in breathing, wheezing, coughing and aggravation of existing respiratory and cardiac conditions.
