How strong is the evidence for global warming?
Lombardo (2009) puts forward the view that the significant rise in the earth’s temperature over the past century is the product of increased levels of atmospheric CO2 caused by greater use of fossil fuels. He maintains that this position is now generally agreed, and that steps should be taken to reduce future warming by restricting the output of greenhouse gases such as carbon dioxide. However, Wong (2011) presents a range of counterarguments. She mentions evidence of historical climate change that cannot have been caused by rising levels of CO2, and also discusses the difficulty of obtaining reliable data on temperature changes, as well as other claims that solar activity may affect the amount of cloud cover and hence temperature levels. Such uncertainty, she considers raises doubts about the value of cutting CO2 production.
2. 4 Write a summary of the above text in standard English. Your summary should not be more than 100 words. (10 marks)
Global warming has been on the rise in the earth’s temperature over the past century is the product of increased levels of atmospheric CO2 caused by greater use of fossil fuels. We should start restricting the output of greenhouse gases such as carbon dioxide. There is difficulty of obtaining reliable data on temperature changes, as well as other claims that solar activity may affect the amount of cloud cover and hence temperature levels.
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