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If the scientists of that time hadn't suspected about the drastic change in temperature, there wouldn't have historical register of the variations of climate.
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If the fossils fuels hadn't been used for the human activity, the global warming would haven't increased.
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If the Industry development hadn`t accelerated, the golbal warming would have been lower.
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If the global warming hadn't been existed, the world average temperature wouldn't have increased.
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If the global warming hadn't been detected, the IPCC (Intergovermental panel of climate change) wouldn't have been created.
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If the meteorologists hadn't study the phenomeno, the relation of Golbal warming with carbon dioxide would haven't been discovered.
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If the global warming hadn't existed, Europe in 2003 would haven't registered the warmest summer in the history.
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If the golbal warming never hadn't increased, the sea level wouln'd have increased in last years.
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If the Wolrd Nations hadn't been aware about the golbal warming, they haven´t signed the Kyoto Protocol.
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If the global warming hadn`t increased, in 2008 the Antartica would haven't melted and lossed lost part of its area.