Skip to main content

Global Warming: Enhanced Greenhouse Effect

Enhanced greenhouse effect results in 'Global warming'. Greenhouses gases such as carbon dioxide, methane, nitrous oxide and chlorofluorocarbons (CFCs) trap the long-wave radiation from the Earth causing the atmosphere to excessive heat up. Water vapor is the most abundant greenhouse gas.
With time the rate of increasing atmospheric temperature is accelerating.

Natural Vs Human - Enhanced Greenhouse Effect

Factors Behind Global Warming

Physical Factors and Global Warming

Changing Output of Solar Energy: 
Peaks of sunspot activity seem to raise global mean temperatures.
Note - Sunspots are areas where the magnetic field is about 2,500 times stronger than Earth's, much higher than anywhere else on the Sun.

Volcanic Eruptions: 
After very violent eruptions, enormous quantities of volcanic dust particles are ejected high into the atmosphere. Global winds distribute the particles, therefore reducing temperatures by shielding the Earth from incoming insolation (total amount of solar radiation energy received on a given surface area during a given time).

 Milankovitch Cycles: 
Variations in the Earth's eccentricity, axial tilt, and precession comprise the three dominant cycles, collectively known as the Milankovitch Cycles for Milutin Milankovitch, the Serbian astronomer and mathematician who is generally credited with calculating their magnitude. Taken in unison, variations in these three cycles creates alterations in the seasonality of solar radiation reaching the Earth's surface. These times of increased or decreased solar radiation directly influence the Earth's climate system, thus impacting the advance and retreat of Earth's glaciers.

Human Factors and Global Warming

The clearance and burning of the rainforests for wood and farming land adds to the level of atmospheric CO2 by reducing photosynthesis.

Industrial Pollution: 
Before the Industrial Revolution, the greenhouse effect was a natural process. With the rise in industrial pollution, global warming has been increasing at a steady pace. Smoke and greenhouse gases are released by the factories into the air, which causes an increase in the greenhouse effect and increase in global warming. Melting of glaciers, extinction of polar beers, floods, tsunamis, hurricanes are few of the effects of global warming. Industrial smoke resulted in global warming where energy that is reflected cannot get past.

Nitrous Oxide: 
Automobile Vehicles have release nitrous oxide from their exhausts. Also produced by soil cultivation practices, especially the use of commercial and organic fertilizers, fossil fuel combustion, nitric acid production, and biomass burning. This pollution affects the ozone layer which help keep out much of the sun’s unwanted rays but all the pollution is making holes in it and letting more energy through.

CFCs from aerosols and refrigerators have reacted with the ozone layer causing thinning and holes. Now largely regulated in production and release to the atmosphere by international agreement for their ability to contribute to destruction of the ozone layer. While emissions of these gases are less concentrated than their predecessors, they are potent, synthetic greenhouse gases. As a greenhouse gas, methane is 23 times more potent than carbon dioxide.

A hydrocarbon gas produced both through natural sources and human activities, including the decomposition of wastes in landfills, agriculture, and especially rice cultivation, as well as ruminant digestion and manure management associated with domestic livestock. On a molecule-for-molecule basis, methane is a far more active greenhouse gas than carbon dioxide, but also one which is much less abundant in the atmosphere.


  • On average, Earth will become warmer. Air temperatures will rise between 1°C and 5°C.
  • Global sea levels will rise, due to melting ice caps and water expansion as temperatures get warmer. Levels could rise 3.6m by 2100 meaning low lying, populated areas will be flooded e.g. The Nile. Fresh water will be contaminated and people will have to move. As many major cities are ports, they will be at great risk. For example, Tokyo, Venice and New Orleans.
  • Warmer conditions will probably lead to more evaporation and precipitation overall, but individual regions will vary, some becoming wetter and others dryer. Intensity and frequency of tornadoes and hurricanes may increase. Tropical diseases such as malaria will move as warmer areas will expand.
  • A stronger greenhouse effect will warm the oceans and partially melt glaciers and other ice, increasing sea level. Ocean water also will expand if it warms, contributing further to sea level rise.

Solutions - 

  • Agriculture: Reduction in fertiliser use. Lower livestock ratio (animals per hectare) More environmentally-friendly farming e.g. organic.
  • Transport: Improved engines to reduce emissions by 25% Increased tax on petrol Lower road-tax for cars with smaller engines.
  • Industry: Stricter emission of all six greenhouse gases Better management of waste-tips and chemical processing.
  • Energy: Develop wind, wave and solar power to replace nuclear power.

Popular posts from this blog

Spotting Error Quiz IV - With Explanation For SSC Exam 2015

  Hello Readers, As you know that Spotting Error types question is an important part of competitive examinations and seldom any book provide you the detailed solution. So we have decided to provide you the previous year questions of  spotting error along with the Explanation . If you like it let us know, you can also ask for detailed solutions of questions that are bothering you. 1.     I found (a)/ the two first chapters of the book (b)/ particularly interesting. (c)/ No error (d) Answer    (b) Explanation : It should be   ‘the first two chapters’ . 2.     Bacon, the father of the English easy (a) / had a thirst (b) / of knowledge (c) / No error (d) Answer    (a) Explanation : The English means the citizen of England.   Article is not used before language

English Error Spotting - Previous Year Questions of SSC CGL

Competition Zenith brings you a post on Error Spotting to boost your English for competitive exams. We are providing you the specifically chosen questions from previous year papers of SSC CGL with the best possible explanation in simplest of the language. Below are some questions with explanation: Questions 1. Have trust on(a)/God and everything(b) /will be right.(c) /(d) No error 2. The cattles (a) /are grazing (b) /in the fields.(c) /(d) No error 3. He is one of (a)/ the best novelists (b) /that has ever lived. Do you agree? (c)/no error (d) 4. On a rainy day (a) /I enjoy to watch TV (b) / with a hot cup of tea.(c ) /no error(d) 5. No sooner did (a)/I reach (b)/ Patna railway station than the train departed(c)/no error (d) 6. There is no agreement (a) / between you and I (b) /so we are free to go our way(c) /no error (d) 7. A variety of books (a) / is available in the market (b) / to help the students qualify the competitive examinations.(c) /no error 8.

Easy way to understand Direct and Indirect speech rules

Introduction. There two ways to convey a message of a person, or the words spoken by a person to other person. 1.       Direct speech 2.       Indirect speech Suppose your friend whose name is Vipul tells you in College , “I will give you a pen”. You come to home and you want to tell your brother what your friend told you. There are two ways to tell him. Direct speech:   Vipul said, “I will give you a pen”. Indirect Speech:  Vipul said that he would give me a pen. In direct speech   the original words of person are narrated (no change is made) and are enclosed in quotation mark. While in indirect speech some changes are made in original words of the person because these words have been spoken in past so the tense will change accordingly and pronoun may also be changed accordingly. In indirect speech  the statement of the person is not enclosed in quotation marks, the word “ that ” may be used before the statement to show that it is indirect sp