Now it merely ranks 10th, something climate scientists shows man-made climate change in action.
The scientists said there was no evidence that the weather changes were a result of Man-made climate change.
One tricky question is whether the overall accelerated melting of the ice sheets can be linked to man-made climate change.
Dr Brandon, who is personally concerned about the potential impact of man-made climate change on the planet, argues that overstating the problem is not helpful.
But taken on its own in the headline the "unprecedented" reference creates immediate alarm and suggests that man-made climate change is running away with itself.
That will constitute a man-made climate change truly worthy of celebration.
And there are questions too of whether hydroelectric schemes are the best way to power a region that regularly sees droughts and may in future see them even more frequently as a consequence of man-made climate change.
Sarah Jackson from the Met Office confirmed that it did not discern any pattern that suggested Man-made climate change was at play in UK rainfall - although if temperatures rise as projected in future, that would lead to warmer air being able to carry more moisture to fall as rain.
It brought this embarrassment on itself when William Kovacs, its senior vice president for environment, technology and regulatory affairs, told the Los Angeles Times that it might seek a full trial of the scientific consensus on man-made climate change to block the EPA's regulatory agenda, which it believed was illegal, unless there were Congressional hearings.
Cars already contribute around 10% of the man-made greenhouse gases that are responsible for climate change.
This concern prompted 49 former NASA scientists and astronauts to send a letter to NASA Administrator Charles Bolden on April 10, admonishing the agency for its role in advocating a high degree of certainty that man-made CO2 is a major cause of climate change, while neglecting basic empirical evidence that calls the theory into question.
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As a quintessential science example, federal climatologist Ben Santer just published a pal-reviewed paper in the Proceedings of the National Academy of Sciences loudly proclaiming that the dreaded man-made global warming signal has emerged from our naturally chaotic climate.
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Researchers are still struggling to disentangle the effects of man-made emissions of carbon dioxide from the natural variability of the climate.
If man-made greenhouse gas emissions are approaching a critical threshold, as the UN's climate experts suggest, the time spent on projects that abate relatively rare gases, but command artificially large profits, may prove a costly distraction.
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