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Critics also have seized upon Sheinbaum’s comments last month — weeks before the L.A. protests — calling on Mexicans in the United States to “mobilize” against a planned U.S. tax on cash transfers to Mexico.

The route has been planned, changed, argued over, compromised and hammered out over many years.

These include bans on single use vapes, forthcoming charges on disposable cups and a planned deposit-return scheme for cans and plastic bottles.

Owners of the refinery, Petroineos, ceased crude oil processing in April, with a planned closure this summer resulting in the loss of 430 jobs.

Lord Browne, who now chairs BeyondNetZero, a fund investing in carbon transition technologies, told Laura Kuenssberg some of the government's plans were "too bullish" and would take more time than planned.