Download The science and politics of global climate change : a guide by Andrew Dessler, Edward A. Parson PDF

By Andrew Dessler, Edward A. Parson

The second one variation of Dessler and Parson's acclaimed ebook offers an built-in therapy of the technological know-how, know-how, economics, coverage, and politics of weather swap. aimed toward the expert non-specialist, and at classes in environmental coverage or weather swap, the publication truly lays out the clinical foundations of weather swap, the problems in present coverage debates, and the interactions among technology and politics that make the weather switch debate so contentious and complicated. This new version is introduced thoroughly brand new to mirror the speedy stream of occasions relating to weather switch. furthermore, all sections were more desirable, particularly a extra thorough primer at the uncomplicated technological know-how of weather swap is incorporated. The ebook additionally now integrates the dialogue of contrarian claims with the dialogue of present clinical wisdom; extends the dialogue of expense and gain estimates; and gives a stronger word list.

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Concern rose further in the 1980s, when extreme ozone losses were observed over Antarctica each spring (October and November) – soon called the “ozone hole” – and CFCs were identified as the cause. After ten years of unsuccessful attempts to solve the problem, nations adopted strict regulations in the late 1980s and 1990s that have nearly eliminated most ozone-depleting chemicals in industrialized countries. Developing countries are now phasing out the chemicals. As a result, the amount of CFCs in the atmosphere has already begun to decline, and stratospheric ozone is projected to recover gradually over 30 to 50 years.

The current warm period has lasted about 10,000 years, roughly the length of previous warm interglacial periods. This might suggest the Earth is due for a gradual, long-term cooling leading to another ice age. Moreover, global temperatures showed a slight cooling trend between about 1945 and 1975, at the same time as it was becoming clear that smoke and dust pollution could shade the Earth’s surface from incoming sunlight and so magnify any natural cooling trend. By the early 1980s, however, global temperatures had resumed warming and many new pieces of evidence showed that warming from greenhouse gases was the predominant concern.

Second, the answer to a positive question, or the truth or falsity of a positive claim, does not depend on who you are, what you like or value, your culture, your political ideology, or your religious beliefs. Finally, arguments over positive claims can often be resolved by looking at evidence. If you and I disagree over whether it is raining, we can look outside. If we disagree over whether winters are getting warmer, we can look at the records of past and present winter temperatures. If we disagree over whether smoking causes cancer, we can look at the health records of a large group of smokers and non-smokers (who are otherwise similar), and observe whether more of the smokers get cancer.

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