'There are no excuses left': why climate science deniers are running out of rope

Guardian environment correspondent Fiona Harvey recalls being heckled at the House of Commons and explains how attitudes to climate have shifted in 10 years

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The shouted words rang out across the packed parliamentary corridor: "Fiona Harvey is the worst journalist there is. She's the worst journalist of them all, because she should know better."

They were the words of Lord Lawson, former UK chancellor of the exchequer, turned climate denier and now Brexiter, addressing a crowd of more than 100 people trying to cram into a House of Commons hearing on climate change. As listeners craned their necks to hear better, whispering and nudging, he elaborated at length on my insistence on reporting the work of the 97% of the world's climate scientists whose work shows human responsibility for global heating, and failure to give equal weight to the tiny number of dissenters.