The air force is working to certify all its aircraft to use synthetic fuels made from gas derived from coal or biomass, using the Fischer-Tropsch method used by Germany during the second world war.

• 空军正在审核让其飞机采用德国在二战期间使用的费歇尔-托罗普希法，来使用由从煤或生物量中提取出来的气体制造出的合成燃料。