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THE ECONOMIST: GREENHOUSE GASES MUST BE SCRUBBED FROM THE AIR

THE ECONOMIST: GREENHOUSE GASES MUST BE SCRUBBED FROM THE AIR

Cutting emissions will not be enough to keep global warming in check

SWEDEN’S parliament passed a law in June which obliges the country to have “no net emissions” of greenhouse gases into the atmosphere by 2045. The clue is in the wording. This does not mean that three decades from now Swedes must emit no planet-heating substances; even if all their electricity came from renewables and they only drove Teslas, they would presumably still want to fly in aeroplanes, or use cement and fertiliser, the making of which releases plenty of carbon dioxide. Indeed, the law only requires gross emissions to drop by 85% compared with 1990 levels. But it demands that remaining carbon sources are offset with new carbon sinks. In other words greenhouse gases will need to be extracted from the air.

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