Big Oil “is this the best you can do” read one placard of a small group of climate protesters gathered outside The Shard – London’s 95-storey skyscraper – on the day the Paris climate agreement entered into force.

Pressed up against the glass-clad tower they could only watch as the media queued up inside for an all-too-rare opportunity to quiz oil and gas bosses about their latest plan to cut planet-warming greenhouse gas emissions.

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