Changes in Earth's Climate

Changes in Earth’s Climate

The Scientific American journal recently reported the impact human civilization has on Earth’s climate, and the obstacles scientists face in mapping global climate changes. The article is titled, “The Human Impact on Climate,” by Thomas R. Karl, and Kevin E. Trenberth.
Evidence shows that humans negatively affect the Earth in many ways. For example, burning of fossil fuels in power plants and automobiles eject particles and gases that change the composition of the atmosphere, and cast a milky haze into the sky. Invisible gases, such as carbon dioxide, remain in the atmosphere for at least ten years. Another example is the destruction of forests. This eliminates trees that would have lowered the risk of the greenhouse effect by absorbing carbon from the atmosphere. Until now the climate changes caused by humans have been modest, but it is thought that these effects will be severely notice...