Jumat, 10 Agustus 2012

Explanation 4

Part I


Global Warming
Global warming is the increasing temperature of earth surface, it had happened since the mid-20th century and it is still continuing until now. Global warming is a bad thing for the earth and the life on it.
Many things cause global warming. Earth naturally insulted by a delicate balance of heat-trapping (greenhouse) gases in the atmosphere. These gases protect the earth, when the sun shines on the earth, these gases absorb some the heat of the sunlight to keep the earth warm enough to support the life. 


However, human activities since the industrial revolution have released more and more carbon dioxide so it has increased the concentration of greenhouse gases. The other gases that become greenhouse gases in the atmosphere are methane, tropospheric ozone, CFCs, and nitrous oxide. The increasing of these gases in the atmosphere makes more and more heat that is trapped in the atmosphere, so it makes temperature increase too. That is the most important thing that causes global warming. There are still many things that cause global warming and they are still caused by human activities, for example deforestation.


Global warming brings damaging effects for the earth and the life on it, for example:
Rising sea levels, leading to more coastal erosion, flooding during storms, and permanent inundation.
Increase drought and increase incident of wildfires.
Impact on human health because mosquitoes and other disease-carrying insects and rodents spread diseases over larger geographical regions.
Disruption of agriculture.
Climate changes.
Global warming is the worst thing that may happen in the earth, but it doesn’t mean that global warming progress cannot be hampered. We can solve this global warming problem to avoid the worst effect of global warming. These are some ways that we can do to solve global warming:
Do not cut down the tree. We must plant the trees and keep them well.
Minimize the used of electricity.
Save the water.


Reduce the used of car and motorcycle because every time we drive a car, we release carbon dioxide and other heat-trapping gases into the air.
Minimize the used of AC.


Every little thing that we do now will determine the kind of world in the future, so keep saving the earth.




Part II
Global Warming
The intergovernmental panel on climate change (IPCC) concludes that most of the observed temperature increase since the middle of the 20th century was caused by increasing concentrations of greenhouse gases resulting from human activity such as fossil fuel burning and deforestation. The intergovernmental panel on climate change also concludes that variations in natural phenomena such as solar radiation and volcanoes produced most of the warming from pre-industrial times go 1950 and had a small cooling effect afterward. These basic conclusions have been endorsed by more than 40 scientific societies and academies of science. Including all of the national academies of science of the major industrialized countries. 

Climate model projections summarized in the latest IPCC report indicate that the global surface temperature will probably rise a further 1.1 to 6.4˚C (2.0 to 11.5˚F) during the twenty – first century. The uncertainty in this estimate arises from the use of  models with differing sensitivity to greenhouse gas concentrations and the use of differing estimates of future greenhouse gas emissions. Some other uncertainties include how warming and related changes will vary from region aroud the globe.

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