According to Greenpeace, emissions from tar sands extraction could growto between 127 and 140m tonnes by 2020, exceeding the current emissionsof Austria, Portugal, Ireland and Denmark.
In one embodiment, the wood tar is subject to a separation process prior to the supercritical extraction to remove a substantial part of the unwanted components.
在一个实施方案中，在超临界提取之前使木焦油经历分离过程以去除绝大部分的所不希望的组分。
3
The smoke extract is with the present method produced by means of supercritical extraction of fractions of the wood tar.