Subjects
Applied Mathematics for Electrical Engineering - 3130908
Complex Variables and Partial Differential Equations - 3130005
Engineering Graphics and Design - 3110013
Basic Electronics - 3110016
Mathematics-II - 3110015
Basic Civil Engineering - 3110004
Physics Group - II - 3110018
Basic Electrical Engineering - 3110005
Basic Mechanical Engineering - 3110006
Programming for Problem Solving - 3110003
Physics Group - I - 3110011
Mathematics-I - 3110014
English - 3110002
Environmental Science - 3110007
Software Engineering - 2160701
Data Structure - 2130702
Database Management Systems - 2130703
Operating System - 2140702
Advanced Java - 2160707
Compiler Design - 2170701
Data Mining And Business Intelligence - 2170715
Information And Network Security - 2170709
Mobile Computing And Wireless Communication - 2170710
Theory Of Computation - 2160704
Semester
Semester - 1
Semester - 2
Semester - 3
Semester - 4
Semester - 5
Semester - 6
Semester - 7
Semester - 8
Basic Mechanical Engineering
(3110006)
BME-3110006
Summer-2019
Question-2a
BE | Semester-
1
Summer-2019
|
04-06-2023
Q2) (a)
3 Marks
Discuss the factors responsible for global warming and ozone depletion
Factors responsible for global warming:
Most Greenhouse gases are generated by mankind, Vehicles burning Fossil fuels and Deforestation.
Global warming is caused by excessive quantities of greenhouse gases emitted into Earth’s near-surface atmosphere.
Greenhouse gases are both man-mad and occur naturally, and include a number of gases, including: carbon dioxide, methane, nitrous oxide, chlorofluorocarbons and water vapor.
Factors responsible for ozone depletion:
The ozone layer depletion is a major concern and is associated with a number of factors.
The main causes responsible for the depletion of the ozone layer are listed below:
Chlorofluorocarbons
Chlorofluorocarbons or CFCs are the main cause of ozone layer depletion. These are released by solvents, spray aerosols, refrigerators, air-conditioners, etc.
The molecules of chlorofluorocarbons in the stratosphere are broken down by the ultraviolet radiations and release chlorine atoms. These atoms react with ozone and destroy it.
Unregulated Rocket Launches
Researches say that the unregulated launching of rockets result in much more depletion of ozone layer than the CFCs do. If not controlled, this might result in a huge loss of the ozone layer by the year 2050.
Nitrogenous Compounds
The nitrogenous compounds such as
NO
2
,
NO
,
N
2
O
are highly responsible for the depletion of the ozone layer.
Natural Causes
The ozone layer has been found to be depleted by certain natural processes such as Sun-spots and stratospheric winds. But it does not cause more than 1-2% of the ozone layer depletion.
The volcanic eruptions are also responsible for the depletion of the ozone layer.
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