Thursday, July 28, 2011

Save the planet!

Global Warming

The problem

The atmosphere consists of many different layers. One of them is the ozone layer which protects the Earth from the ultraviolet (UV) rays of the sun. However, because of the pollution there is a big hole in this layer. So, we have a rise of the temperature. Apart from that, gases which come from factory chimneys, cars and from burning fossil fuels are also part of the problem. As a result, the ice in both Poles melts and the sea level rises. There are lots of serious floods in towns and cities on the coast. Moreover, some species will become extinct because of the climate changes. In addition to this, more lands will dry and there will be less food in the world.

The cause

The cause of this problem is the gases that people send to the atmosphere. There are: carbon dioxide (CO2), chlorofluorocarbons (CFCs), methane and nitrous oxide. Carbon dioxide is the most important gas that causes the half of the problem. It comes from the burning of the rainforest trees and fossil fuels (coal, gas and oil). Chlorofluorocarbons are in aerosols (spray cans, air conditioners), refrigerators (the CFCs are in the liquids which keep fridges cold) and plastic boxes (for hamburgers, pizzas, etc.). Methane and nitrous oxide come from fertilizers, cows' stomachs and rubbish.

The solution

We can't stop the global warming, but we can slow it down. There are several ways to do this: Fist, we should burn less fossil fuels. We must protect the rainforests and not cut them down. Furthermore, we can use natural energy which comes from the sun, the sea and the wind. Finally, we should stop using the CFCs and replace them with other chemicals which don't damage our planet.

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