航空制造商劳斯莱斯表示，由于气候变化热心人士对航空业施加越来越大的减排压力，可能需要新的方法，包括强制使用可持续航空燃料（SAF），以实现环境目标。As the aviation industry comes under increasing pressure from climate-change activists to reduce its emissions, engine-maker Rolls-Royce says new approaches, including mandating use of sustainable aviation fuels (SAF), may be needed to meet environmental targets.