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: 
The scrubber is an electrostatic precipitator in which the dirty air is cleaned by capturing gas like SO2 and other oxides in water/lime spray (CaCO3).
Illustration of Electrostatic Percipitator:
High value of BOD (Biochemical Oxygen Demand) indicates that: [2015 RS]
Biochemical 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:
(i) There is a high level of microorganisms in the water.
(ii) 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]
Eutrophication is the excessive growth of algae, plants, and animals in water bodies due to nutrient enrichment, particularly with nitrogen and phosphate.
There is a drastic decrease in oxygen replenishment inside water. Non-availability of oxygen results in the death of aquatic animals.
Joint Forest Management Concept was introduced in India during: 
Joint forest management or JFM is a programme launched by the Government of India in 1988 and guidelines issued in 1990.
It aims at establishing the partnership between local communities and state forest departments.
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers: 
The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation.
A river with an inflow of domestic sewage rich in organic waste may result in: 
Domestic sewage rich in organic waste leads to an increase in Biological Oxygen Demand, which leads to a decrease in D.O. (dissolved oxygen) which leads to the death of fishes.