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A decade of dirty tricks
A decade of dirty tricks

... and its manipulation and distortion of climate science can be traced back to May 1990, when it attempted to water down the conclusions of the first assessment report of the Intergovernmental Panel on Climate Change. The IPCC – 2500 of the world’s top scientists – was set up by the United Nations in ...
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... temperature was more than 1 degree Celsius (1.8 degree Fahrenheit) greater than today, I argue that we can allow at most one degree Celsius of additional global mean warming.” “It is possible to limit additional global warming to less than one degree Celsius, but it would require slowing the growth ...
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... Counting the cost of climate change at an agricultural level The problem of global climate change has, arguably, been analysed more intensively than any other environmental problem that humanity has faced. The analysis undertaken by climate scientists and summarised in the Fourth Assessment Report ...
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Introduction to discussion on Climate Change

... Nino constantly insists that proof of anthropogenic climate change is weak. It is not a repeatable experiment unlike astronomy it does not repeat itself. Can we improve the evidence for or against? Does it matter whether it is man made or naturally occurring? I suggest that we should carry out any e ...
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Scientific opinion on climate change



The scientific opinion on climate change is the overall judgment amongst scientists about whether global warming is happening, and if so, its causes and probable consequences. This scientific opinion is expressed in synthesis reports, by scientific bodies of national or international standing, and by surveys of opinion among climate scientists. Individual scientists, universities, and laboratories contribute to the overall scientific opinion via their peer-reviewed publications, and the areas of collective agreement and relative certainty are summarised in these high level reports and surveys.The scientific consensus is that the Earth's climate system is unequivocally warming, and that it is extremely likely (at least 95% probability) that humans are causing most of it through activities that increase concentrations of greenhouse gases in the atmosphere, such as deforestation and burning fossil fuels. In addition, it is likely that some potential further greenhouse gas warming has been offset by increased aerosols.National and international science academies and scientific societies have assessed current scientific opinion on global warming. These assessments are generally consistent with the conclusions of the Intergovernmental Panel on Climate Change, the IPCC Fourth Assessment Report summarized:Warming of the climate system is unequivocal, as evidenced by increases in global average air and ocean temperatures, the widespread melting of snow and ice, and rising global average sea level.Most of the global warming since the mid-20th century is very likely due to human activities.Benefits and costs of climate change for [human] society will vary widely by location and scale. Some of the effects in temperate and polar regions will be positive and others elsewhere will be negative. Overall, net effects are more likely to be strongly negative with larger or more rapid warming.The range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time.The resilience of many ecosystems is likely to be exceeded this century by an unprecedented combination of climate change, associated disturbances (e.g. flooding, drought, wildfire, insects, ocean acidification) and other global change drivers (e.g. land-use change, pollution, fragmentation of natural systems, over-exploitation of resources).Some scientific bodies have recommended specific policies to governments and science can play a role in informing an effective response to climate change, however, policy decisions may require value judgements and so are not included in the scientific opinion.No scientific body of national or international standing maintains a formal opinion dissenting from any of these main points. The last national or international scientific body to drop dissent was the American Association of Petroleum Geologists, which in 2007 updated its statement to its current non-committal position. Some other organizations, primarily those focusing on geology, also hold non-committal positions.
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