Global Warming And Its Effects On The Coastal Areas of Bangladesh
Global Warming is the rise in the average temperature of the Earth’s atmosphere, including the surface air and oceans. In simple words global warming is when the Earth heats up. It is caused mainly due to increasing concentration of greenhouse gases in the Earth’s atmosphere. The greenhouse gases, include carbon dioxide, nitrous oxide, methane, water vapor, traps heat and light in the Earth’s atmosphere, which increases the temperature. Today global warming is considered as one of the major environmental issues, which threatens to disrupt the basic balance of the environment and cause large scale destruction.
The Greenhouse Effect:
There are certain gases that raise the temperature by trapping the sun’s heat and energy. The Earth’s average temperature would have been about 60Error! Hyperlink reference not valid. colder if it weren’t for these gases. These gases are referred to as “greenhouse effect” because of the way they help to keep the Earth warm.
The greenhouse effect makes the Earth suitable for all living things. The Earth might have been freezing or it might also have been burning hot if the greenhouse effect did not occur. However, the presence of too many such gases can cause the Earth to get unusually warmer. The plants would not be able to take such heat and eventually they would have died. The scarcity of plants would cause animals to die of hunger and simultaneously resulting in the end of the human race.
Cause of Global warming:
Many things contribute to global warming. The causes can be split into two groups: 1. Natural causes.
2. Man-made or anthropogenic causes.
1. Natural causes:
Natural causes are causes created by nature. The release of methane gas from arctic tundra and wetlands is one such natural cause. Methane, being a greenhouse gas, traps heat in the Earth’s atmosphere resulting in global warming. Another natural cause is that the earth goes through a cycle of climate change. This climate change usually lasts about 40,000 years. Solar variation
Green house gases and solar forcing affect temperatures in different ways. While both increased solar activity and increase greenhouse gases are expected to warm the troposphere, an increase in solar activity should warm the stratosphere while an increase in greenhouse gases should cool the stratosphere.
2. Man-made Causes:
There are many man-made causes. Human activities cause pollution which is introducing a contaminant into the environment. Pollution is one of the biggest man-made problems. Humans pollute the environment in various different ways. Humans burn fossil fuel to produce electricity and run vehicles. This results in air pollution because burning fossil fuel releases carbon dixode and methane into the atmosphere. Example of fossil fuel includes oil and petroleum. Although petroleum is used for 38% of United States’ energy, it gives off a lot of pollution. [pic]
Some other ways of polluting the air by using energy:
➢ Watching TV
➢ Playing video games
➢ Using a hair dryer or dish washer
➢ Turning on a light
Cutting down of trees and forests is known as deforestation. People have been doing this for thousands of years to different purposes such as manufacturing furnitures. If trees are pulled down then they cannot capture carbon dioxide. This carbon dioxide escapes into the atmosphere contributing to global warming. Population
Another major man-made cause of Global Warming is population. More people means more food, and more methods of transportation. That means more methane because there will be more burning of fossil fuels, and more agriculture. Another source of methane is manure. Because more food is needed we have to raise food. Animals like cows are a source of food which means more manure and methane. Another problem with...
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