Environments Essay

2930 words - 12 pages

CHALLENGE OF CLIMATE CHANGE AND BD PERSPECTIVE

INTRODUCTION

1. Climate change is a change in the statistical distribution of weather over periods of time that range from decades to millions of years. A change of climate which is attributed/influenced directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate changeability observed over comparable time periods. In the latter sense it may be qualified as anthropogenic change of climate, more generally known as "global warming" or "Anthropogenic Global Warming" (AGW).
2. Presently this rapid climate change has become the major catastrophe and the greatest threat ...view middle of the document...

WORLD WIDE AFFECTED REGIONS
6. Presently there are very few countries who are not suffering from terrible hand of climate change. But due to the melting of the ice berg, the normal sea level has increased to an anxiety level. So the low lying countries like Asian mega deltas includes Bangladesh, Indonesia, India, China, various parts of Africa continent specially in the sub-Saharan region and the small islands are affected by flood, draught and various natural calamities almost every year. The causes of deadly cyclone Catrina in USA, Ayla & Sidor in Bangladesh are the terrible results of climate change in the recent past.

REASONS OF CLIMATE CHANGE
7. Greenhouse Effect and Ozone Layer. Scientists have discovered that concentrations of GHGs in the atmosphere, particularly carbon dioxide (CO2) are rising. These gases could trap more heat in the atmosphere is leading to a gradual warming of the Earth’s atmosphere. Ozone layer depletion is also an impact of greenhouse effect.

8. Industrialization. Significant numbers of large scale industries are generating toxic elements in both gaseous and solid form, chemical and unrefined wastes causing air pollution and placing extra load on the environment.

9. Urbanization. The unemployed rural people migrating to the larger cities causing scarcity of housing land, drainage problem, excessive production of sewage and other wastes, traffic congestion etc. shrinks down cultivable land of the country. These all badly affect the environment causing ultimate effect on weather.

10. Deforestation. According to a recent estimate, over the past 50 years nearly 14% (?) of the forest area had been deforested. This is causing excess pressure on ozone layer which ultimately affects the climate.

11. Marine Pollution. Ships operating at sea and ship breaking industries mainly in the SE Asian coastal areas are polluting the sea and adjacent land area by discharging liquefied petroleum gas and oxygen, large amount of fuel and other oily substances adding threat to marine environment. It further makes the sea surface polluted and warmed and increasing the temperature.

12. Air Pollution and Transportation. The major sources of air pollution occur due to the burning of fossil fuel, petroleum for transportation etc. These cause increasing of CO2 in the environment and affecting the weather.

13. Pressure by Population Growth. The world’s population growth is rising specially in SE Asia at 17,000 people/sq km by 2050. This leads to a massive disruption of traditional land and resource management system. Thus the nature is charged excessively to meet the demand of huge population for their livelihood causing an ecological imbalance to the nature.

IMPACT ON BANGLADESH

14. The poorest countries have always been predicted to be worst hit by this human-induced global warming. According to the 3rd Assessment Report of IPCC, Bangladesh ranks high in the list of most vulnerable countries. High...

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