Over the past years the problem that has most scientist and people in the world concerned is global warming. What leads to global warming is called the green house effect, where the atmosphere builds up by gases, like methane and carbon dioxide, and keeps heat from the sun in the atmosphere, which increases the temperature on Earth. Many people think that global warming and the green house effect are the same thing but it is not. The greenhouse effect is the heat that comes from Earth so it may care for the needs of all life on earth. While global warming is an issue because the more gases that are produced by man the more gases will be in the atmosphere, which upsets the natural balance.