Measurements and speculation are different, and you can tell the difference if you try

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Below are the final exchanges from a piece on Thursday’s Today programme. Justin Webb is the Today presenter, Brian Hoskins is a scientist from Imperial College, and Nigel Lawson is the ex-Chancellor. It starts with Hoskins addressing the measurement (note that word, it will come up again) that although over the last 40 or so years we had significant global warming, the temperature rise (at the surface) looks to have slowed a bit over the last 10 to 15 years.

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