Sustainable alternative fuels (SAF) are the best solution to air transport’s emissions challenges, at least in the short- to medium- term.  They are so far the only option for making the existing fleet more environmentally friendly and less reliant on fossil fuels.  Although it accounts for just 2% of the world’s human-induced CO2 emissions, the aviation industry is committed to improving fuel efficiency by an average of 1.5% a year between 2010 and 2020; capping net ...

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