So you are saying there is no environmental problems caused by extraction? Or are you saying that the extraction problems remain solely local? Which is it Dung? I have answered your question many times. You just are too ignorant to comprehend.
So tell me... what impact is it that you think drilling and transportation have that remain solely local?
It's a simple and straighforward question, SF. And you have yet to answer it. Try again: What GLOBAL (as opposed to local) environmental problems are caused by the extraction (as opposed to the use) of fossil fuels?