Agreeing on technical standards will be difficult enough . Harder still , says nancy graham , an icao official , will be paying for it all .
统一技术标准已经够困难的了，但据icao官员南希格雷汉姆称，更困难的是这一切要付出的代价。
In january , icao secretary general raymond benjamin said he would produce a proposal on how to regulate aviation emissions on a global scale by year-end .
The bloc has also said it would scrap the plan if there were a comparable international agreement through the united nations civil aviation body , known as icao .
The international civil aviation organization ( icao ) later attributes the mysterious deviation to " a considerable degree of lack of alertness and attentiveness on the part of the flight crew . "
