Global Warming

Global Warming, also known as the Greenhouse effect, is a problem everyone will soon have to face. The people of the younger generations should be educated about what Global Warming is and that it is caused due to the way people are treating the environment.

Planet Earth is estimated to be 4.5 billion years old, and life on earth has existed for more than 3.5 billion years. Humans have been on earth for 2 to 3 million years. It is only been in the past 200 years people have been affected by global warming. The last 40 years have been the most damaging.

As the impacts of human influences have grown, so have the risks associated with those impacts. New technologies carry increasing risks, and the scale, frequency, and impacts of disaster caused or influenced by human activity are growing tremendously. The risks to the Earth¡¦s natural systems are becoming significantly concerning.

The world¡¦s population, currently 5.2 billion has grown from about 3 billion in 1960, and around 2 billion in 1925. Today it increased by almost 90 million each year, and is likely to reach 10 billion by 2025(Corson 4).

The reason we currently have an atmosphere crisis is because of human impact on the gases which make up our atmosphere. Our atmosphere, which is made up of four distinct layers blankets our planet and protects up in many way. One way it protects us if from the harmful rays the sun radiates on our planet. Each layer differs from the others in temperature, density, composition and in the way it absorbs radiation from the sun. The atmosphere itself is some 300 miles thick. The first layer is the Troposphere. It is the lowest layer and extends higher than any airplane can travel, about 6.8 miles. Air in this layer is heated by the earth itself and for every 1000 feet the temperature drops 3.5 „a F. When it reaches the top of this layer the temperature is about - 70„a f. The next layer extends to about 30 miles. It is less dense than the underlying layer. Unlike the troposphere, temperature increases with altitude. This warming is caused by a layer of ozone.

Ozone is a form of oxygen. The ozone absorbs most of the sun¡¦s ultraviolet radiation. This has two important effects, First, it warms the air in the stratosphere. Second, it prevents much of the harmful rays from reaching the earth surface. Tempe...

... middle of paper ...

...tities of pollutants are pouring into the atmosphere , posing health threat to humans, damaging the environment and changing the Earth¡¦s climate. Historically, the air has renewed itself through interaction with vegetation and the oceans. Today, however, this process is threatened by increasing use of fossil fuels, expanding industrial production, and growing use of motor vehicles.(Corson 220)

The most common and widespread pollutants currently emitted by human activities are sulfur dioxide, nitrogen oxides, carbon monoxide, carbon dioxide, volatile organic compounds particulate. Dozens of toxic chemicals are commonly found in the air surrounding urban areas.

In recent years, many industrial nations have controlled air pollution with some success. Europe and North America are now suffering serious damage from acid deposition. Increasing pollution from the growing use of motor vehicles plagues many nations. Car sales in Western industrialized nations rose 71 percent from 1970 to 1986.

Sources Cited

National Research Council (NRC). 1993. Research to Protect, Restore, and Manage the Environment. ("The Corson Report.") Washington, DC: National Academy Press.