A location with the luxuriant growth of lichens on the trees indicates that the: 
A scrubber in the exhaust of a chemical industrial plant removes: 
Illustration of Electrostatic Percipitator:
High value of BOD (Biochemical Oxygen Demand) indicates that: [2015 RS]
Biochemical Oxygen Demand or Biological Oxygen Demand is a measurement of the amount of dissolved oxygen (DO) that is used by aerobic microorganisms while decomposing organic matter in water. A high BOD indicates two things: -
1. There is a high level of microorganisms in the water, and
2. There is a high content of organic material in the water that is broken down by the organisms. This is an indication of organic pollution.
The UN Conference of Parties on climate change in the year 2011 was held in: [2015 RS]
The UN Conference of Parties on climate change in 2011, was held in Durban, South Africa. It aimed at decrease of pollutant emission.
Which of the following is NOT one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone? [2015 RS]
Liver cancer is caused due to aflatoxin released by Aspergillus fungus and Vinyl chloride. UV-rays are not related with liver cancer.
The UN conference of Parties on climate change in the year 2012 was held at: [2015 RS]
This conference occured from 20 Nov to 8 December, 2012 to extend the life of the Kyoto Protocol at Doha in Qatar.
Acid rain is caused by increase in the atmospheric concentration of: [2015 RS]
60 - 70% SO2 and 20 - 30% NO2 contribute in the acid rain
Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of: [2015 RS]
Joint Forest Management Concept was introduced in India during: 
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers: 
A river with an inflow of domestic sewage rich in organic waste may result in: 
Domestic sewage rich in organic waste leads to increase in Biological Oxygen Demand, which leads to decrease D.O. (dissolved oxygen) which leads to death of fishes.