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It summarises a research project which examined 928 studies from a decade of scientific journals (1993-2003). Not a single scientific study disagreed with global warming being a problem humans are causing. 0 out of 928! I'm not sure how much more settled you can get.
But for some strange reason, 53% of media reports express doubt. I'm not sure whether it's in the media's interest to stir up fake controversy, or whether there are vested interests at play, but 53% is much more than 0 out of 928.