Environmental Studies (CTET)

Yes, it is the correct answer.

78.09% Nitrogen, Nitrogen is a Chemical element with symbol N and Atomic number 7. Nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas.

A major in- stream use of water is for producing hydrolectric power, in which turbines are turned by the moving water to generate electricity. 

Chlorofluorocarbons released from the surface of the Earth, rise slowly into the stratosphere. This is the gas responsible for depletion of ozone layer.

The buffalo allow the birds to sit and rest on their backs as they protect them from the pests such as flies, bugs, and many other creatures.

Slash-and-burn is an agricultural technique,  which involves cutting and burning of forests or woodlands to create fields. This is not part of green revolution.

Excessive use of pesticides pollutes the lithosphere. Lithosphere is the solid crust from the center of the earth to the outer surface. It gets polluted due to dumping of pesticides and herbicides.

The World Health Organization WHO is a specialized agency of the United Nations (UN) that is concerned with international Public health. It was established on 7 April 1948, with its headquarters in Geneva Switzerland. WHO is a member of the United Nations Development Group. Its predecessor, the Health Organization, was an agency of the League of Nations.

A habitat characterized by hot and dry places is called xeric. Xeric shrub lands receive an annual average rainfall of ten inches or less, and have an arid or hyper arid climate, characterized by a strong moisture deficit, where annual potential loss of moisture from evapotranspiration well exceed the moisture received as rainfall.

45 dB intensity of sound regarded as the safe noise level for the city.

Soil and water get polluted when DDT is sprayed on crops.  When DDT is sprayed on the crops soil absorbs it and thus soil also gets polluted.

Sunderlal Bahuguna is a noted Garhwali environmentalist, Chipko movement leader and a follower of Mahatma Gandhi's philosophy of Non-violence and Satyagraha. This idea of chipko movement was of his wife and the action was taken by him.

Most types of bacteria survive freezing, but they do become inactive while the food is slowly and safely preserved, preferably overnight in the refrigerator.

World Environment Day is an annual event that is aimed at being the biggest and most widely celebrated global day for positive environmental action. World Environment Day activities take place all year round and climax on 5 June every year, involving everyone from everywhere.
The World Environment Day celebration began in 1972. 

Biodegradable waste material can be made harmless by the action of certain bacteria on them. Biodegradable waste can be decomposed by the action of bacteria on them,  and hence they do not remain in the same physical form that they were in, when they were chucked out.

Wood is a renewable source of energy. This is because, we can burn recently grown wood, and we can plant more trees. When oil or coal is used up, it's gone and can't be replaced.

Rich in mineral resources, MP has the largest reserves of diamond and copper in India. More than 30% of its area is under forest cover.

Biochemical oxygen demand is more in polluted water and less in potable water. A low BOD is an indicator of good quality water, while a high BOD indicates polluted water. There are generally no standards for an absolute BOD value of drinking water. However, a sample with a BOD between 1 and 2 mg/L indicates a very clean water.

Sedimentation is a physical water treatment process using gravity to remove suspended solids from water. Solid particles entered by the turbulence of moving water may be removed naturally by sedimentation in the still water of lakes and oceans. Settling basins are ponds constructed for the purpose of removing solids by sedimentation. Clarifies are settling basins built with mechanical means for continuous removal of solids being deposited by sedimentation.

Minamata disease is a form of methyl mercury poisoning. Caused by eating large quantities of fish and shellfish polluted by methyl mercury in factory waste water.

Deforestation clearance or clearing is the removal of a forest or stand of trees where the land is thereafter converted to a non-forest use.
Examples of deforestation include conversion of forestland to farms, ranches or urban use.

All of the above are correct answers.

Van Mahotsav is celebrated in the month of July. Van Mahotsav is a week long festival. Tree planting is organized every year in the month of July all across India and lakhs of trees are planted. It is one of the best ways of preventing earth from global warming.