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Recent questions tagged environmental issues

Explain eutrophication.

asked Apr 13, 2019 by priyanka.clay6

1 answer

Write a note on sources of noise pollution and effect of noise pollution.

asked Apr 13, 2019 by priyanka.clay6

1 answer

Observe the following figure carefully and answer the questions that follow

asked Apr 13, 2019 by priyanka.clay6

1 answer

a)Why are catalytic convertors recommended for vehicles ? <br> b)Why should such vehicles use only unleaded petrol. <br> c)Why is CNG preferred to diesel as a fuel in vehicles.

asked Apr 13, 2019 by priyanka.clay6

1 answer

Enlist four harmful effects caused to the humans living in areas having polluted air. Suggest two measures to reduce air pollution.

asked Apr 13, 2019 by priyanka.clay6

1 answer

Deforestation is creating a lot of problems in the environment. List the consequences of deforestation.

asked Apr 13, 2019 by priyanka.clay6

1 answer

During the past century, lakes and ponds in many parts of the earth have been gradually converted into land. <br> (a) What is the phenomenon called? <br> (b) How does human activity accelerate this phenomenon ? <br> (c) What measures can we take to control this?

asked Apr 13, 2019 by priyanka.clay6

1 answer

Explain bio magnification of DDT in an aquatic food chain. How does it affect the bird population?

asked Apr 13, 2019 by priyanka.clay6

1 answer

Integrated organic forming is a cyclical zero waste procedure. Justify.

asked Apr 13, 2019 by priyanka.clay6

1 answer

People have been actively participating in the efforts for the conservation of forests. <br> (i) Name the award instituted in respect of Amrita Devi to promote such efforts. <br> (ii) Name the movement launched to protect the trees by hugging them. <br> (iii) Name the step Government of India has undertaken in 1980.s to work closely with the local communities for protecting and managing forests.

asked Apr 13, 2019 by priyanka.clay6

1 answer

Many coastal areas may get submerged due to the environmental changes taking place at the present rate. Give the cause, and state two measures to check it.

asked Apr 13, 2019 by priyanka.clay6

1 answer

Why are grains and vegetables produced in organic farms supposed to be better for human consumption than those produced in farms where chemical fertilizers, pesticides etc. has been used?

asked Apr 13, 2019 by priyanka.clay6

1 answer

What are the advantages of CNG?

asked Apr 13, 2019 by priyanka.clay6

1 answer

India in last two decades has seen a boom in automobile production and use. <br> (a) What has been its environmental impact ? <br> (b) What steps are being taken so that the rapid increase in the number of automobiles does not become a curse?

asked Apr 13, 2019 by priyanka.clay6

1 answer

Dumping waste in landfills is not a real solution for disposing wastes. Why?

asked Apr 13, 2019 by priyanka.clay6

1 answer

Identify the wrong pair/s and correct it. <br> a) Chernobyl incident - Radioactive waste. <br> b) Snow blindness cataract - High dose of CFC. <br> c) Chipko movement - Save trees. <br> d) Polyblend - Solves air pollution. <br>

asked Apr 11, 2019 by priyanka.clay6

1 answer

In the above graph what does A and B depict?

asked Apr 11, 2019 by priyanka.clay6

1 answer

CFCs are widely used as refrigerants. Then why is it suggested to reduce its emission a far as possible? Explain.

asked Apr 11, 2019 by priyanka.clay6

1 answer

A farmer saw water in a pond turned green and with dead fishes. <br> a) What is the reason for the death of fishes? <br> b) Name the phenomenon that leads to the death of fishes.

asked Apr 11, 2019 by priyanka.clay6

1 answer

A person has inhaled air having particulate pollutants of size less than 2.5 micrometers in diameter. What could be the impact of their pollutants on his respiratory system?

asked Apr 11, 2019 by priyanka.clay6

1 answer

A man had a B. class Benz which has a very good catalytic converter. On his way the petrol was exhausted and he stopped at a petrol pump. The person at the petrol pump had only leaded petrol. Out of necessity the man had to fill leaded petrol in his car. <br> a) What is its impact on the catalytic activity of the converter ? <br> b) Explain the impact on the environment.

asked Apr 11, 2019 by priyanka.clay6

1 answer

It was observed that some of the aquatic birds’ population has been declining. On analysis of the water in their habitat, high concentration of DDT was found. <br> a) What caused the decline is birds’ population? <br> b) What is this phenomenon known as?

asked Apr 11, 2019 by priyanka.clay6

1 answer

Vehicles are fitted with catalytic converters. Give reason.

asked Apr 11, 2019 by priyanka.clay6

1 answer

Electrostatic precipitator can remove over 99% particulate matter present in exhaust from a thermal power plant. How?

asked Apr 11, 2019 by priyanka.clay6

1 answer

Jhum cultivation has been in practice from earlier days, but its considered more problematic these days. Why?

asked Apr 11, 2019 by priyanka.clay6

1 answer

A radiation causes ageing of skin, skin cancer, and inflammation of cornea called snow blindness. It also damages DNA. Name the radiation.

asked Apr 11, 2019 by priyanka.clay6

1 answer

Jhum cultivation has been in practice from earlier days, but its considered more problematic these days. Why?

asked Apr 11, 2019 by priyanka.clay6

1 answer

Why was the Montreal Protocol signed?

asked Apr 11, 2019 by priyanka.clay6

1 answer

What is the noise level that can cause permanent impairment of hearing ability of human beings?

asked Apr 11, 2019 by priyanka.clay6

1 answer

PM2.5 is responsible for causing greatest harm to human health. What is it? How is it harmful?

asked Apr 11, 2019 by priyanka.clay6

1 answer

Why should the velocity of air between the plates of an electrostatic precipitator be low?

asked Apr 11, 2019 by priyanka.clay6

1 answer

The central pollution control board observed that a thermal power plant is emitting 80% of its particulate matter in the exhaust due to poor maintenance? What could be the cause for this increase in % of particular matter?

asked Apr 11, 2019 by priyanka.clay6

1 answer

Why is a scrubber used? Which spray is used on exhaust gases passing through a scrubber?

asked Apr 11, 2019 by priyanka.clay6

1 answer

Motor vehicles with catalytic converter should use unleaded petrol. Why?

asked Apr 11, 2019 by priyanka.clay6

1 answer

The birds egg shells become thinner in an area where there is an excess application of pesticides. Comment.

asked Apr 11, 2019 by priyanka.clay6

1 answer

Mention the information that the health workers derive by measuring BOD of a water body.

asked Apr 11, 2019 by priyanka.clay6

1 answer

Why should the velocity of air between the plates of an electrostatic precipitator be low?

asked Apr 11, 2019 by priyanka.clay6

1 answer

How has DDT caused decline in bird population?

asked Jul 12, 2017 by pady_1

1 answer

What is the main idea behind “Joint Forest Management Concept” introduced by the Government of I

asked Jul 12, 2017 by pady_1

1 answer

How can slash and burn agriculture become environment friendly?

asked Jul 12, 2017 by pady_1

1 answer

What is hybrid vehicle technology? Explain its advantages with a suitable example.

asked Jul 12, 2017 by pady_1

1 answer

What are the three major kinds of impurities in domestic waste water?

asked Jul 12, 2017 by pady_1

1 answer

What do you understand by Snow-blindness?

asked Jul 12, 2017 by pady_1

1 answer

It is a common practice to plant trees and shrubs near the boundary walls of the buildings. What pur

asked Jul 12, 2017 by pady_1

1 answer

Name one green house gas and its possible source of production on a large scale. What are the harmfu

asked Jul 12, 2017 by pady_1

1 answer

Is it true that if the dissolved oxygen level drops to zero, the water will become septic. Give an e

asked Jul 12, 2017 by pady_1

1 answer

Is it true that carpets and curtain/drapes placed on the floor or wall surface can reduce the noise

asked Jul 12, 2017 by pady_1

1 answer

What is cultural eutrophication?

asked Jul 12, 2017 by pady_1

1 answer

What is the best solution for the treatment of electronic wastes?

asked Jul 12, 2017 by pady_1

1 answer

What is reforestation?

asked Jul 12, 2017 by pady_1

1 answer

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