وربما يحتاج الأمر إلى تدابير إضافية لتحسين فعالية المركبات، خاصة في ضوء نمو حصة مركبات الترفيه والعمل في نقل الركاب.
The European CommunityEuropean Community estimates a total mitigation impact of 82,000 Gg CO2 in 2010, and thereafter a further 5,000 to -10,000 Gg CO2 thereafter However, these targets are non-binding and the effectiveness of these agreements has yet to be proved and monitored over time as these targets are non-binding Further measures to improve vehicle efficiency are likely be required, especially in light of the growing share of sport-utility vehiclesSUV in passenger transport.