Specification for design of fuel gas system and combustible gas emission system in petrochemical enterprises 石油化工企业燃料气系统和可燃性气体排放系统设计规范
2.
The measure would set caps on u . s . emissions of greenhouse gases beginning in 2012 with the goal of cutting emissions 63 percent by 2050 这项方案将在2012年覆盖美国温室的气体排放系统,目标是在2050年前将排放降低百分之六十三。