The aviation industry, seen by many as one of the worst offenders when it comes to carbon emissions, is being pressured to find new ways of going green.<br /><br />Although aeroplane-makers claim that they are building aircraft that are more fuel efficient than ever before, their models still emit huge amounts of carbon.<br /><br />Airbus says that it is leading the charge to find cleaner alternatives to standard aviation fuels, but environmental activists say the claims are little more than hype.<br /><br />Al Jazeera's Dan Nolan reports from Dubai.
