造成这种情况最主要的原因在于，伦敦是八家矿业和商业公司的所在地，而自然资源的价格飞速上涨。
The main reason is that London is home to eight mining and commodity companies at a time when natural resources prices have been soaring.
莫利矿业是此类公司中首个宣称已有可用资源的。
Molycorp is the first such company to declare it has a viable source.
尽管津巴布韦拥有大量的矿产资源，大部分矿业公司的长期计划陷入僵局。
Despite Zimbabwe's mineral riches, most big mining firms have stalled future plans.
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