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Climate change '95% man-made'

Scientists have said they are more certain than ever that humans are responsible for the majority of climate change, according to a major report on the issue. But the trend in the average global temperature has declined since 1998.

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CO2 levels 'increased by 40% since pre-industrial times'

The Intergovernmental Panel on Climate Change said carbon dioxide concentrations have increased by 40% since pre-industrial times, primarily from fossil fuels such as coal and petroleum.

The UN's Environment Programme wrote on Twitter:

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