This is oil and gas that we already know about and already have the expertise to exploit. The technology that we don’t yet have will only be developed if there is a demand for them – if the demand is now the technology will be developed. There is little point in us leaving this particular fuel to future generations when we are the first generation that has the technology to exploit such deposits. Future generations may improve on the technology and make it safer but the fundamental capability, the breakthroughs that make it possible have already happened. Future generations on the other hand will have their own breakthroughs in terms of new forms of power and new discoveries of fuels. They are then much less likely to need these resources than we do now.