In reply to Scarab9: While a lot of areas in the Oil&Gas industry are, undoubtedly pretty unethical, it's a bit unfair to tar the entire industry with the same brush!
My current job, for example, deals with preventing leaks on process pipework due to vibration induced fatigue. On the one hand we will be helping the operators to make more money, but we are also preventing hydrocarbon leaks (lives saved, environment protected).
I'd much rather work in another industry, but if we stopped what we're doing the environment would not be any better off...
Looking forward to an oil-free world!