my school assignment; a report about the Global Warming

title:The Earth Is In Danger
1.1 Introduction
Today's people are spending their daily lives on earth doing few things. The biggest and most serious environmental problem that the earth is facing currently and into the future is called Global Warming. This report will be addressing and identifying the issues of global warming such as greenhouse gas, greenhouse effect, feedback, climate change and climate models. The report will also identify solutions to fix these major environmental issues.

2.1.1 Greenhouse Effect
The greenhouse effect is the heating of the Earth’s surface, due to the presence of the greenhouse gases. It is named this way because of the similar effect produced by the glass panels of a greenhouse which retains the heat. The way the Earth is heated is by heat wave lengths coming from the sun which passes through the Earth’s atmosphere and then is absorbed by the surface of the Earth which causes warming. Some of the absorbed energy is than reradiated back into the atmosphere where some of this energy escapes back into space. The greenhouse effect is very important. Without the greenhouse effect, the Earth would not be warm enough for humans to live or survive on. But if the greenhouse effect becomes stronger, it could make the Earth surface warmer than usual. Even a little extra warming may cause problems for humans, plants, animals and other living things on earth.

2.1.2 Greenhouse gas
Greenhouse gases are a naturally blanket that is designed to keep the earth at 33 degrees Celsius warmer than it would be without these gases in the world’s atmosphere. If the earth did not have the greenhouse gases, the world would be inhabitable for people. This is called Greenhouse effect. Out the past few years the earths temperature has increased by about .5 degrees and scientists believe this is because of an increase in concentration of the main greenhouse gases: - carbon dioxide, methane and nitrous oxide. From the change in temperature over the past century people are calling this the beginning of the Global Warming. People are starting to fear that if we keep producing such gases at these high increasing rates it will have a negative impact on nature. Some of the problems from greenhouse gasses are flooding, droughts, sea levels rising and the Earths precipitation. These changes to the environment will most likely cause negative effects on society, such as lower health and decreasing economic development. However, some scientists argue that the global warming we are experiencing now is a natural phenomenon, and is part of Earth's natural cycle. Presently, nobody can prove if either theory is correct, but one thing is certain; the world has been emitting greenhouse gases at extremely high rates and has shown only small signs of reducing emissions until the last few years.

2.2. Climate variability
Climate Variability is also know as climate change. This a long term significant change in the average weather that is given region experiences. The average weather may include average temperature, precipitation and wind patterns. This all involves changes in the variability or average state of the atmosphere over long durations that are ranging from decades to millions upon millions of years ago. These changes can cause major problems on earth such as sunlight intensity. The terms ‘climate change’ refer to changes in modern climate.
3.3. Climate changes
The world’s climate change is a result of the changes in the weather patterns because of a rise in Earth’s average temperature. Climate change is caused by an increase in greenhouse gases in earth’s atmosphere. This gas absorbs heat from the sun instead of heat leaving earth’s atmosphere, some trapped, making earth warmer. Climate changes also know as global warming. Greenhouse gases have been a natural part of atmosphere. Absorb and re-radiate the sun’s warmth and maintain earth’s temperature at a level necessary to support life. Since Industrial Revolution have steep rise in concentration of gases in the atmosphere because of the human activity. All of this is enhancing greenhouse effect; this is contributing to the warming of earth’s surface.


more to go... but i havent completed it yet...