Global Warming
Uploaded by maiohhmy on Dec 17, 2008
Global Warming: A Crisis ready to Strike
Global warming is an increase in the earth's temperature due to fossil fuels, industry, and agricultural processes caused by human, natural, and other gas emissions. This results in an increased evacuation of greenhouse gases. “Short-wave solar radiation sinks into the Earth's atmosphere and warms its surface while long-wave infrared radiation emitted by earth's surface is absorbed, and then re-emitted by trace gases.” (Wikipedia)
Climate changes occur in our earth's atmosphere due to a buildup of greenhouse gases. Greenhouse gases can occur naturally as well as a result of human activities. The greenhouse gases are carbon dioxide, methane, and nitrous oxide; “Carbon dioxide is released into the atmosphere when solid waste, fossil fuels, and wood are burned.” (Wikipedia) The gases help to warm the surface of the Earth. Each greenhouse gas absorbs heat differently. If natural gases did not occur, the temperature of the earth would be considerably cooler. Problems can occur when higher concentrations of greenhouse gases are present in our atmosphere because they have enhanced our earth's heat trapping capability.
Human activities add to the levels of these gasses, causing more problems, “automobiles, heat from homes and businesses, and factories are responsible for about 80% of today's carbon dioxide emissions, 25% of methane emissions, and 20% of the nitrous oxide emissions.” (Wikipedia) The increase in agriculture, deforestation, landfills, industrial production, and mining contribute a significant share of emissions also. These gases that are released into the atmosphere are tracked by emission inventories. An emission inventory counts the amount of air pollutants discharged into the atmosphere. These inventories are important in studying the affects of global warming on the Earth.
The Centers for Disease Control have been involved in studying global warming's effect on human health. Its affect on the climate can adversely affect humans. Plagues have been attributed to global warming. An increase in temperature can result in a longer life cycle for diseases or the agents spreading them. Global warming will lead to more precipitation, which enables infectious diseases to be more easily contracted and spread. Effects of global warming on human health might not be immediately detected but it is slowly and surely becoming evident.
Birds are a species that will be affected by a change in the climate. Global warming might result in birds finding a more permanent home in...