Causes of Global Warming

Burning coal, oil and natural gas to heat (or cool) our homes, power our cars, and provide electricity for our machines & lights produces carbon dioxide & other gases as by-products. Deforestation and the clearing of land for agriculture also release large amounts of these gases.
Since the industrial revolution, we have been emitting gases, such as carbon dioxide & methane faster than natural systems can remove them from the atmosphere. So these gases are increasing in our atmosphere. With the increasing in the population of the world, these gases are also increasing at an even faster rate and will continue to do so in the future.
Gases like water vapor, carbon dioxide, ozone, methane, nitrous oxide & chlorofluorocarbons are all increasing in the earth’s atmosphere because of human activities. All of these gases trap heat in the earth’s atmosphere; because of this, they are known as GREENHOUSE GASES.
The earth receives heat from the rays of the sun (solar radiation). Most of this heat is absorbed by the earth but a significant amount is reflected back into the earth’s atmosphere and it is returned to outer space. However, the greenhouse gases, which trap heat on earth, are increasing, so they trap more heat than they have done in the past.

The Greenhouse effect

All serious scientists support the view that global warming is happening & caused by human activities. The scientists who don’t support this view work for the industries which are causing global warming. To understand global warming you must first understand the greenhouse effect. The greenhouse effect is a natural phenomenon. After the sun’s rays enter the Earth’s atmosphere, the earth absorbs most of it, while the rest is deflected back into space. Atmospheric gases, called greenhouse gases, absorb some of this energy. The energy trapped by these gases warms the planet’s surface, creating a greenhouse effect. However, as the amount of greenhouse gases increase, then to does the amount of heat it traps. The result of this is global warming. Atmospheric concentrations of greenhouse gases have increased dramatically since the start of the industrial revolution. Most scientists agree that the cause of this rise is human activity, in particular the burning of fossil fuels. As these gases increase, they trap more heat and the earth gets warmer.

Effects of Global Warming

In the 1980’s scientists began to get worried that the earth was getting ever hotter. After conducting research, these scientists concluded that:
The average temperature of the earth had increased by 1° F (O.6°C). The level had risen by 10-25cm around the world. There is a strong relationship between the increase in world temperatures and the amount of greenhouse gases present in the atmosphere. Human activities increase the amount of these greenhouse gases. As we can see, even small changes in world temperature could set in motion large changes; these changes, due to global warming, will not be felt equally around the world, their affects will differ, from region to region. So the effects of global warming will be on: a change in the world’s climate; sea levels rising; a reduction in water supplies; a change in the world’s agricultural systems; changes of the world’s natural areas (for example cold areas will decrease) and an increase in disease.

Climate change

Various climatic conditions have happened recently which provide proof that global warming is real:
The 14 hottest years the world has experienced have happened in the last 20 years.There has been a big increase in rainfall in some areas of the world, causing widespread flooding.The El Nino effect in the Pacific Ocean happens when the ocean warms up every few years, this kills a lot of life in this ocean. This is happening more frequently now.We have to listen to what the scientists are telling us about global warming. If we don’t control pollution from industrial activities, then there will be terrible consequences all over the world in the near future.

An Inconvenient Truth Review

An Inconvenient truth it is a presentation done by Al Gore an American politician, teacher, businessman, and environmentalist. From 1993 to 2001 .Al Gore talks about a problem of the global warming and what we will face in the future. Also he showed some facts that happened with the affection on some of the landscapes in different parts in the world. Another thing, he mentioned the green houses and how it makes a big change in the world's climate. In addition he discussed the high decrease of ice pieces in the Greenland west the Antarctica. Then he showed the rapid increase of the co² level in the recent years and what danger that will cause in the future. At the end of the film he gave us a hope that if we started to take the right actions to prevent the global warming we will defiantly succeeds in stopping it in the future.