The Air Prevention and Control of Pollution Act came into force in :
-
Solution
In India, the Air (Prevention and control of pollution)Act came into force in 1981 but was amended in 1987 to include noise as an air pollutant.
Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?
-
Solution
Marsh gas is another term form ethane,produced by plants decomposing under water.
Secondary sewage treatment is mainly a
-
Solution
In secondary treatment mainly settled sewage flows to an aerobic biological treatment stage where it comes into contact with micro-organisms which remove and oxidise most of the remaining organic pollutants.
Which one of following pairs of gases are the major cause of“Greenhouse effect”?
-
Solution
CO2 and N2O are major green house gases.
Chipko movement was launched for the protection of
-
Solution
Chipko movement was launched for the protection of forests. The Chipko movement refers to the unique form of protest adopted by the rural people in the himalayan region of India in the 1970s and 80s, against the indiscriminate logging and felling of trees that spelt the destruction of their environment. The first Chipko action occurred in April 1973. Over the next five years, the movement spread to several hill districts in Uttar Pradesh.In 1980, Chipko activists won a fifteen-year ban on green felling in the himalayan forests.
DDT residues are rapidly passed through food chain causing biomagnification because DDT is
-
Solution
DDT residues are rapidly passed through food chain causing biomagnification because DDT is soluble in lipids. Biomagnification, also known as bioamplification or biological magnification, is the increase in concentration of a substance, such as the pesticide DDT,that occurs in a food chain as a consequence of:
•Persistence (slow to be broken down by environmental processes)
•Food chain energetics
•Low (ornon-existent) rate of internal degradation/excretion of the substance (often due to water-insolubility)
Montreal protocol aims at
-
Solution
The aim of Montreal protocol was to protect the ozone layer in the stratosphere by decreasing and eventually eliminating the use of ozone depleting substances like CFC.
Measuring Biochemical Oxygen Demand (BOD) is a method used for :
-
Solution
BOD is a measure of organic matter present in water. It refers to amount of O2 consumed by microbes to decompose all the organic matter in 1L of water at 20°C for 5 days. The greater the BOD of waste water, more is its polluting potential.
“Good ozone “ is found in the
-
Solution
Good ozone occurs naturally in the earth’s upper atmosphere 10 to 30 miles above earth’s surface(stratosphere) where it forms a protective layer that shield us from the sun’s harmful ultraviolet rays.
Which one of the following statements is wrong in case of Bhopal tragedy ?
-
Solution
The Bhopal gas tragedy was occured on the night of December 2-3 , 1984 at the Union carbide India Limited pesticide plant in Bhopal, M.P. A leak of methyl isocyanate gas and other chemicals from the plant resulted in the exposure of hundreds of thousands of people.