GWD-15TH

cathyzq

Twenty years ago, Balzania put in place regulations requiring operators of surface mines to pay for the reclamation开垦 of mined-out land.  Since then, reclamation technology has not improved.  Yet, the average reclamation cost for a surface coal mine being reclaimed today is only four dollars per ton of coal that the mine produced, less than half what it cost to reclaim surface mines in the years immediately after the regulations took effect.

 

Regulation to pay for the reclamation of mined out landàprice highàbut currently only less than half of price to pay for the reclaim surface mines

Explain the reason.

 

Which of the following, if true, most helps to account for the drop in reclamation costs described?

 

1. Even after Balzania began requiring surface mine operators to pay reclamation costs, coal mines in Balzania continued to be less expensive to operate than coal mines in almost any other country.无关
2. In the twenty years since the regulations took effect, the use of coal as a fuel has declined from the level it was at in the previous twenty years.
3. Mine operators have generally ceased surface mining in the mountainous areas of Balzania because reclamation costs per ton of coal produced are particularly high for mines in such areas.

这道题选的是C，可是我第一感受是B因为我的理解是因为这个征开垦的费用产生后，导致一般人不去用这个煤，所以使用的少了，价格下降了，那么征的钱也少了。C我知道是用的其他原因解释。但是可否帮助我纠正一下我的想法，谢谢。