How Does Global Warming Affect Us ?
The earth is warming now. The climate change will bring us sea level rise, drought, flooding, desertification and so on. In short, the earth will become unliveable. Grobal warming means increase of sea and earth surface temperature since late 19th century. We need to aware how it is dangerous and how to prevent this phenomenon. Therefore, there are causes of grobal warming. Grobal warming is not start it by itself, but human interacting this problem.
//The earth can keep warm because of the greenhouse effect. The greenhouse effect is a naturally occurring process that aids in heating the earth’s surface and atmosphere.
Without the greenhouse effect, the earth would lose lots of heat from the sun, and would be chilly with an average temperature of 0 degrees Fahrenheit (-18 degrees Celsius) (Nova 1).
The greenhouse effect is like a blanket because when solar radiation reaches the surface of the earth, it is reflected back out into space; however, some greenhouse gases absorb and reradiate this radiation to the earth (figure 1). So, some heat is kept in the atmosphere (CEOSR 1). That’s why the earth keeps warm constantly. //
However, the climate is changing from human activities, which have greatly increased greenhouse gases. We call this change global warming. Global warming is a phenomenon in which the earth’s temperature rises from an increase of carbon dioxide or other greenhouse gases. When we burn fossil fuels as coal, gasoline, diesel and oil, it brings forth carbon dioxide. Because of human activity, greenhouse
Figure 1. Greenhouse effect
gases and water vapor have increased in the atmosphere since the beginning of the industrial revolution. For example, deforestation causes an increase of carbon dioxide. When trees grow, they absorb carbon dioxide, and release oxygen. Therefore, if we keep cutting trees, we cannot gain a lot of oxygen, and we increase carbon dioxide. Also the industrial revolution contributed to building factories. When factories produce products, they burn fossil fuels, and then they produce carbon dioxide. Most of the water vapor is evaporated from the ocean surface, so it doesn’t harm us. But, carbon dioxide is different. It doesn’t disappear, and it influences us. This is called enhanced greenhouse effect. And the enhanced greenhouse effect is the major cause of global warming (Houghton 18).
How does global warming affect us? There are several potential effects. First, it affects sea level. Because of increased temperature, the polar ice cap is melting, and it causes sea-level rise. As NASA’s Global Change Master Directory says, “Sea level is indeed rising. This determination is made when one averages changes in sea level over the entire globe for the past century. The Intergovernmental Panel on Climate Change (IPCC) has estimated that the global average sea level has risen 10 to 25 cm (4 to 10 inches) in the past century” (1)....