Global Warming Essay -- Environment Global Warming Climate Change

Global WarmingFor the ratiocination 20 forms or so the subject of global warm up has spawned wake uped debate among the cosmeas brightest minds. Its causes and effects, if either actually lasts, convey been hotly debated. The almost popular hypothesis is called the greenhouse effect with the concord upon cause existence green house gasses. These gasses are all of course occurring and include water vapor, methane, oxygen, and the now infamous speed of light dioxide. Greenhouse gasses exist in the atmosphere and cast an effect on our global weather. They trap radiated heat and prevent it from exiting our atmosphere. This supposedly increases global temperatures and is, or will, cause run of the polar ice caps. This in turn is expected to raise ocean level and cause global coastal flooding.A brief geology lessonThe world we live on is at to the lowest degree 4.6 one million million divisions old. In that time span it has undergone immense changes. At one time most of t he land surface was connected. The continents separated and migrated to their present positions. The push back behind this is called plate tectonics. The sea floor is still spreading today and is the driving force for all of the earthquakes and volcanic activity that we experience today. Convection currents created by the tremendous heat and pressure of the inner core move the plates. This core is undergoing massive nuclear reactions. The heat produced migrates outward and the currents it produces move the plates. This process also releases enormous amounts of carbon dioxide and water vapor. This has been taking place since the Earth was formed. We know from geological eternalise that there have been numerous greenhouse and icehouse ages. The question is, is the greenhouse state of matter caused by greenhouse gasses? Probably not, at least not entirely. on that point are several other factors involved - the most significant being the Milankovitch cycles. These are three cycle s that describe the motion of the Earth through space. The set-back involves the Earths orbit around the sun. The orbit is not abruptly round, but elliptical. This means that at one point the Earth is snuggled to the sun than at other times. This cycle takes about 100,000 years to complete. The morsel cycle involves the tilt of the Earths axis vertebra. The Earths axis is currently tilted about 23.5 degrees. But this tilt is not constant. end-to-end a period of about 40,000 years the tilt changes a f... ...een demo a downward trend since their peak in 1940. Satellite readings underwrite to show a decrease in temperature. They recorded 1997 as the coolest year since this technology has been implemented. This imagery was also accurate enough to predict that La Nina would predominate in 1998, lowering global temperatures significantly2. That same year Moscow recorded its coldest December in a century3. ConclusionThis large(p) world of ours has been around for a long time at least 4.6 billion years. During that time untold and unimaginable changes have taken place. eternal icehouse and greenhouse ages have come and gone. Continents have been created, destroyed, and migrated over and over again. Thousands, maybe millions, of species have come and gone. All this, and more, without any influence from man. In geologic terms we have been on this Earth for a very, very improvident time. The Earth evolves on a time scale that we cannot comprehend. It has developed a balance, a system of checks and balances, which we have little or no overlook over. To think that we can alter a global climate that has been 4.6 billion years in the making merely shows just how much we have yet to learn.