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Global Warming ­ a CONTROVERSIAL issue Global warming remains controversial because:

Scientists cannot prove theories ­ if results support an idea it doesn't mean it proves it ­ there could be alternative explanations.
There is incomplete knowledge of how the climate systems on our planet work, and the data sets…

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Changes in the suns radiation

Limitations of future climate change models include:

We don't know how CO2 emissions will change ­ will we continue with `business as usual' or will we emit less?
Limited knowledge of how the climate system works.
The change in atmospheric CO2 concentration due to natural…

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