Overview on Global Warming
What is global warming? Global warming can be described through the green house effect; gases allow short and long wave radiation from the sun to pass through them unabsorbed. Green house gases trap heat, which enhances the absorption and conservation of sunlight energy into additional heat. Therefore, global warming is the increase of Earth’s average surface temperature due to the effect of greenhouse gases (carbon dioxide and other global warming pollutants) that are collecting in the atmosphere, trapping the sun’s heat and causing the planet to warm up. Although temperatures fluctuate naturally, over the past fifty years the average global temperature has increased at the fastest rate in recorded history. Most of these emissions come from combustion of fossil fuels in cars, factories, and electricity production. Global warming greatly affects many areas of the supply chain and how it operates. Insert Rachael’s Part!
Another area that is most concerned with global warming is transportation. Transportation is the leading cause of global warming; the United States’ transportation is accountable for about one third of the country’s emissions, while globally about 15 percent of manmade carbon dioxide comes from cars, trucks, airplanes, ships, and other vehicles. In particular, green house gases produced by freights within the U.S. contributed to nearly 28 percent of the total green house gas emissions from transportation, or 7.8 percent of total green house gases that were emitted in 2007 (See Appendix 1). This figure has grown from 23 percent of transportation green house gases that were emitted in 1990, because of the increased emissions from trucking, which is shown in Appendix 1. Currently, trucking is the dirtiest mode of transportation in terms of emissions; it accounts for 75% of the gases emitted by all modes of transportation. While freight rail contributes to 9%, ships contribute to 7%, and commercial aircraft contributes to...
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