Producing biofuels from a fast-growing grass delivers vast savings of carbon dioxide emissions compared with petrol, a large-scale study has suggested. US researchers also found that switchgrass-derived ethanol produced 540% more energy than was required to manufacture the fuel.
One acre (0.4 hectares) of the grassland could, on average, deliver 320 barrels of bioethanol, they added.
Decision a blow to campaigners, who say the ads gave the Saudi Aramco unearned climate credibility.
Labour's Jacob Collier warns parliamentary debate of "coordinated strategy" by oil companies to delay climate action.
Critics fear that Equinorโs latest UK education deal is aimed at quelling opposition to North Sea drilling.
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