Global warming is rising at the average temperature of the Earth's surface. Since the late 1800s the global average temperature increased from 0.4 to 0.8 degrees C. According to the calculations made by many experts, the average temperature increase by 2100 will be between 1.4 and 5.8 degrees. This increase rate can be much more than past increase rates.
Scientists are concerned that the human community and the natural ecosystem cannot adapt to a rapid climate change. An ecosystem is composed of a private area, living organisms and physical environment. Global warming can cause a lot of damage, so all the world countries have drafted the Treaty of Kyoto protocol to help limit it.
Reasons for global warming
Global climatologists (scientists working in climate science) have analyzed the global warming that has occurred since the late 1800s. The majority of climatologists have decided that human beings are responsible for a very large amount of warming. Human activities contribute to global warming by increasing the natural greenhouse effect of the Earth. The greenhouse effect warms the surface of the earth with a complex process that encompasses sunlight, gases, particles in the atmosphere. Greenhouse gases are the name given to gases trapped in the Earth's atmosphere. (The most harmful greenhouse gas is carbon dioxide. The Kyoto Accord predicts the release of carbon dioxide, as well as reducing the emissions of methane and nitrous oxide gases.)
The main human activities contributing to global warming are the destruction of fossil fuels (coal, oil and natural gas) and deforestation. Most fuel consumption: it occurs in automobiles, factories, power plants. Carbon dioxide gas (chemical formula CO2) is revealed by the burning of fossil fuels. CO2 is a greenhouse gas that slows the output of the heat into space. Trees and other plants use CO2 in the air to produce nutrients using photosynthesis. The destruction of forests contributes to the proliferation of CO2 by reducing the amount of gas destroyed by plants or by decomposition of dead vegetation.
A small amount of scientists say greenhouse gases have not made measurable changes in temperature. They say that my natural formation could cause global warming. These formations include increases in energy emitted from the sun. But the vast majority of climatologists believe that the rise in the sun's energy has a very small effect on global warming.