Tuesday, January 20, 2009

GLOBAL WARMING....

Welcome to our blog “ the nature of global warming”. We have 4 members for discuss and produce this blog to our English class and also to extend more knowledge and information about global warming treat. We are, Hafizi Mat Salleh, as a leader, Haslinur Md Din and the other members are Siti Haslina and Nurul Shuhada Alias.

Before we start, our discussion about 4 question, which are already agreement from all members, we are excited to wish thank a lot for our madam, Pn.Hafizah, she has give permission to our group so that taken those topic in our blog. She has a new hope so that, we can brought those topic with more details. How we got those topic ? Why we were excited and suggested to do this topic?..ok..let me show you all, how we were got those topic!!!!...one more time…our leader..gave the first suggestion so that we were discuss about global warming…but.. other members..Siti Haslina not agree with those topic..because she already know about obesity..obesity?why obesity?..depend on her, obesity is a good topic to discuss because have many benefit and she want we were try to did about “ overweight and obesity among Malaysian. From the article, we found those overweight and obesity among Malaysian need urgent attention again public ignorance on the problem.

Adult obesity in Malaysia from 1996- 2006 had more than tripled with out of every 10 Malaysian above 18 years of age era now being either overweight or obese...But we took one week to compared which topic we have to choose. After that???what’s up? But..my leader gave his instruction to us, so that found both of topic and if each one have more detail information and more latest issues, we must choose those….after one week, we have a meeting at ptsl . we gave all information, which are already found each other. How?what happened??..last but not least..we still choose global warming issues..

For the short term, why we so interested with global warming topic???.. because..measurements of temperature taken by instruments all over the world, on land and at sea have revealed that during the 20th century the Earth’s surface and lowest part of the atmosphere warmed up on average by about 0.6°C. During this period, man-made emissions of greenhouse gases, including carbon dioxide, methane and nitrous oxide have increased, largely as a result of the burning of fossil fuels for energy and transportation, and so on..global warming is now considered most probably to be due to the increases in greenhouse gas emissions and concurrent increases in atmospheric greenhouse gas concentrations, which have enhanced the Earth's natural greenhouse effect. If the climate changes as current computer models have projected, global average surface temperature could be anywhere from 1.4 to 5.8°C higher by the end of the 21st century than in 1990,to put this temperature change into context, the increase in global average surface temperature which brought the Earth out of the last major ice age 14,000 years ago was of the order of 4 to 5°C.

Very interesting right?..so…to be continue…





WHAT IS GLOBAL WARMING???????

Nowaday, global warming very popular issue because this problem can give effect for human, environment and other. Global warming is the increase the average temperature in the Earth's near-surface air and oceans since the mid-20th century and its projected continuation. Global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during 100 years ending in 2005. The Intergovernmental Panel on Climate Change (IPCC) concludes that most of the temperature increase since the mid-twentieth century is "very likely" due to the increase anthrophogenic greenhouse gas concentrations. Natural phenomena such as solar variation and volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward. These basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries.

Climate model projections indicate that global surface temperature will likely 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 use of differing estimates of future greenhouse gas emissions and from use of models with differing climate sensitivity. Another uncertainty is how warming and related changes will vary from region to region around the globe. Although most studies focus on the period up to 2100, warming is expected to continue for more than a thousand years even if greenhouse gas levels are stabilized. This results from the large heat capacity of the oceans.

Increasing global temperature will cause sea levels to rise and will change the amount and pattern of precipitation, likely including an expanse of the subtropical desert regions. Other likely effects include increases in the intensity of extreme weather events, changes in agricultural yields, modifications of trade routes, glacier retreat, species extinctions and increases in the ranges of disease vectors. Most national governments have signed and ratified the Kyoto Protocol aimed at reducing greenhouse gas emissions. Political and public debate continues regarding what, if any, action should be taken to reduce or reverse future warming or to adapt to its expected consequences.

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