OpinionCOP26 shows that Big Oil's energy transition plans are not yet trustedUnwelcome at the UN climate summit, the industry still has a mountain to climb to convince the general public it is genuine about the shift to lower carbonTalking heads: Climate activists demonstrate outside the Grangemouth refinery and petrochemical plant in Scotland. Owner INEOS has promised a decarbonisation project for the facility.Photo: AFP/SCANPIXRob WattsGlasgow