Sir David believes the washout summer may be down to climate change. As a credible explanation he points to research by the University of Sheffield which suggests melting Arctic ice has slowed the jet stream, causing it to break into loops which have ushered to the UK unseasonably cold and wet weather systems. And he is convinced humans are the main cause of this.
"There is no question that climate change is happening; the only arguable point is what part humans are playing in it," he says. "I would be absolutely astounded if population growth and industrialisation and all the stuff we are pumping into the atmosphere hadn't changed the climatic balance. Of course it has. There is no valid argument for denial."
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