Nevertheless, the slow pace of policy and institutional reforms in the region has prevented the creation of an enabling environment for public and private sector investment in the energy sector.
碳氢化合物来自不完全的燃油燃烧或油箱和化油器中蒸发的未燃汽油；阿拉伯国家每年从车辆排出物中散发出300万吨碳氢化合物。