Tag: global environmental change
Questions Related to global environmental change
Global warming can be controlled by
-
Reducing reforestation, increasing the use of fossil fuel
-
Increasing deforestation, slowing down the growth of human population
-
Increasing deforestation, reducing efficiency of energy usage
-
Reducing deforestation, cutting down use of fossil fuel
Global warming is the biggest challenge for the developing countries like India. The rapid increase in human population and the increased levels of pollution are the major contributors of global warming.The percentage of heat-trapping carbon dioxide (CO$ _2$) increases due to the burning of fossil fuels to generate electricity, fuel our cars, and heat our homes. Deforestation also increases the concentration of carbon dioxide in the atmosphere.
Excess of carbon dioxide in the atmosphere leads to
-
Global warming
-
Ozone depletion
-
Acid rain
-
None of the above
Modern human activities are responsible for the release of huge quantities of CO$ _2$ in the atmosphere. The major activities, which contribute towards this, are burning of fossil fuels and cultivation of the soil. Although CO$ _2$ is not considered as a pollutant, an increase in its proportion in the atmosphere can lead to global warming through increased greenhouse effect.
Which of the following defines the effect of deforestation on the next generation?
-
Global warming
-
Global cooling
-
Both A and B
-
None of the above
Chernobyl nuclear tragedy occurred in
-
April, 1986
-
August 6, 1945
-
August 9, 1945
-
December 3, 1984
The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the Chernobyl nuclear power plant in Ukraine. In this accident, large quantities of radioactive particles were released into the atmosphere, which spread over much of the western USSR and Europe. It was the worst nuclear accident in history.
Environment is warmed up by
-
Water vapour
-
Methane
-
$CO _2$
-
All of the above
The greenhouse effect is caused by the greenhouse gases. The gases methane, carbon dioxide, and water vapour trap the solar radiations which need to be reflected back to the atmosphere and increase the temperature of the earth. The greenhouse is considered as the direct cause of global warming.
Presence of CFCs in the atmosphere is responsible for
-
Formation of ozone
-
Production of healthy plants
-
Depletion of ozone layer
-
None of these
CFCs are used as coolants in refrigerators, coolers, etc. The CFCs causes the breaking of the ozone molecule which forms the oxygen radical and O$ _2$. So, the presence of CFCs in the atmosphere results in the depletion of the ozone layer and allowing the penetration of the harmful UV radiations from the sun into the Earth's atmosphere.
What immediate hazard is likely to occur if the temperature of the earth rises by 5$^oC$?
-
Increase in productivity
-
Melting of polar ice
-
Destruction of phytoplanktons
-
Inundation of coastal towns
What is the potential danger of greenhouse effect?
-
Poor photosynthesis
-
Heavy rainfall
-
Coastal flooding
-
More humidity in environment
Which of the following does not contributes to greenhouse effect?
-
Carbon dioxide
-
Carbon monoxide
-
Chloro-fluoro carbon and Methane
-
Refrigerant freon
Ultraviolet light causes
-
Destruction of hydrogen bonds between complementary DNA strands
-
Photodynamic action
-
Sticky metaphases
-
Formation of pyrimidines