Causes Of Global Warming

Our planet is going through a period of immense changes in the climate. The temperature of our planet is increasing slowly and steadily .This condition is described as global warming. The average normal temperature of the planets atmosphere has increased in the past two decades. According to the scientists the temperature has increased about 1degree Fahrenheit within the last century.

"The change in the earth’s orbit or axis also causes changes in climate as well as changes in temperature."

The main hypothesis puts global warning as the culprit for this rise in temperature. Changing human life styles causes an increased emission of carbon di oxide and other green house gases in earth’s atmosphere. Earth’s atmosphere has a particular amount of carbon di oxide which is needed for keeping the planet warm and to make life possible on earth. But large amount of green house gases prevent the natural reflection of the heat energy back to the space, and causes increased temperature within the earth’s atmosphere.

Some scientists are of opinion that global climatic changes and increased average temperature of the earth is not caused by human activities, but by natural causes like sunspot cycle and change in the axis or tilt of the earth.morethan that, asteroid collisions spews out more dust particles in to the atmosphere than one can imagine. The amount of sulfur oxides, which is belched out of massive volcanic eruptions, comes more than that produced by any human activity. The explosions on the sun’s surface produces intense heat energy, when this heat radiation reach the earth’s surface it can cause increased temperature within the earth’s atmosphere.

"The change in the earth’s orbit or axis also causes changes in climate as well as changes in temperature."

The change in the earth’s orbit or axis also causes changes in climate as well as changes in temperature. Any change in the axis of the earth makes the earth either to move towards the sun or move away from the sun. If the planet earth move towards the sun, the quantity of the heat rays reaching the earth will be more, which will result in increased temperature patterns in the earth’s atmosphere or we can say it as global warming.

There are many evidences showing that the drifting of continents or the plate tectonics also can cause considerable changes in the planet’s climate. Plate tectonics cause the poles to get separated from warm ocean currents and affect the global climate adversely.

Even though several natural causes are there, the recent increase in the average global temperature is attributed mainly to human activities. It is found that the concentration of carbon di oxide in the atmosphere is alarmingly increased in the past decade and it is still rising.

the earth is not able to handle the excessive carbon di oxide so it get circulated through the earth’s atmosphere .this gas acts as a barrier to the reflected heat from the earth and produces the green house effect, or increased temperature. More than sixty percent of global warming is believed to be caused by carbon di oxide.

The process of burning invariably emits carbon di oxide. Burning fossil fuels like diesel, petrol, or gas is a major carbon di oxide producer. The smoke emitted by various industries and factories, coal fired electrical power plants, using fire wood as fuel all add to the total carbon di oxide levels. The rise of industries in the past decades has dramatically increased the global warming by the emission of various green house gases. As the trees are continuously felled for industrial use and for building houses and sky-scrapers the produced carbon di oxide remain in the atmosphere. It is not converted to oxygen or not recycled in any way.

Another green house effect producing gas that causes global warming is nitrous oxide .it produced when something undergo decay. Nitrous oxide is also released during various agricultural and industrial processes. Another major man made cause for global warming is the CFC’s or scientifically known as Chloro Fluro Carbons.

ChloroFluroCarbons are widely used in refrigerators and in aerosol sprays. The chloro fluro carbons cause global warming by damaging the ozone layer. The ozone layer is a protective layer in the earth’s atmosphere which prevents the harmful radiation of the sun from reaching the earth. The ozone layer is already damaged by the indiscriminate use of various chemicals by man.

Every year thousands of refrigerators are dumped to the waste yard and million cans of aerosol sprays are used every day in this affluent world, imagine the amount of chloro fluro carbons released to the atmosphere by them!

Global warming is also caused by another green house effect producing gas called methane. The release of methane occurs naturally as well as due to human activities. Natural emission of this green house gas is mainly from the marsh lands present in this vast world.

Methane is commonly called as the ‘marsh gas’. Another source of methane is the Arctic Tundra. This natural emission of methane cannot be prevented by any methods. Dumped, decaying garbage is a source of methane and cow dung also emits methane .To some extent these methane can be made use as a fuel for cooking purpose by setting up bio-gas plants which is fuelled by cow dung or by bio-degradable waste.

To keep our earth an inhabitable place for the generations to come, we should take necessary measures to prevent or reduce the human induced causes of global warming.