More controls needed?

The European Commission proposed in December 2006 to set carbon dioxide emission quotas for airlines from 2011, a stance already met with hostility by the aviation industry and environmentalists. The proposal, which still has to be adopted by EU member states and the European Parliament, would see emissions rules imposed from 2011 on intra-European flights and from 2012 for flights originating outside the bloc. Aircraft carbon dioxide emissions account for only about three percent of the global total but they have increased by 87 percent since 1990, according to the Commission, the EU's executive body.So I ask why isn't more being done about it? It is just as serious andthe same as emissions emmited by other forms of transport, so why aren't there more conrols being enforced?