They were duped – and so were we. That was the conclusion of last week’s damning revelation that world leaders signed the Paris Agreement on climate change under the sway of unverified and questionable data. A landmark scientific paper –the one that caused a sensation by claiming there has been NO slowdown in global warming since 2000 – was critically flawed. And thanks to the bravery of a whistleblower, we now know that for a fact. The response has been extraordinary, with The Mail on Sunday’s disclosures reverberating around the world. There have been nearly 150,000 Facebook ‘shares’ since last Sunday, an astonishing number for a technically detailed piece, and extensive coverage in media at home and abroad. It has even triggered an inquiry by Congress. Lamar Smith, the Texas Republican who…