Engineering News 21 November 2011.

Biofuels may need to comprise as much as half of South African Airways’ (SAA’s) fuel supply by 2020 if the national carrier is to avoid future carbon penalties, Public Enterprises Minister Malusi Gigaba said on Monday…

http://www.engineeringnews.co.za/article/saa-mulls-big-biofuels-shift-in-bid-to-avoid-possible-carbon-penalties-2011-11-21