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SIX months ago world leaders made grand promises to act on climate change. A war, an energy crisis and an inflation spike later, it is hard to find signs that the vows made at the COP26 summit in Glasgow, UK, are being honoured.

Germany is building new gas terminals in haste, the UK is mulling classifying gas production as a green investment and Chinese coal production was up 10 per cent in the first four months of the year.

Yet climate change marches inexorably on regardless. India has been hit by earlier heatwaves than usual. The Great Barrier Reef …