And so, they don't exploit the natural resources, like mining does, or petroleum extraction.

因此，他们不会像采矿或石油开采那样开采自然资源。

The Boeing-Vertol Model 234 is a commercial variant of the Chinook used for logging, construction, firefighting, and supporting petroleum extraction operations worldwide.

波音-Vertol 234 型是支奴干直升机的商业变体，用于全球范围内的伐木、建筑、消防和支持石油开采作业。