Virtual737 wrote:You mean muddy the waters to the point that it would be almost impossible to come up with accurate figures to compare apples with apples? Were there also no emissions in building the aircraft, building the airports, building the oils wells, production platforms and refineries... building the super tankers and the oil pipelines?
I'm a huge aviation nut but I wont come up with arguments that put me on the same level as a NIMBY complaining about an airport that was built before my house.
The infrastructure has already been built. Much of the world is working towards emissions targets that were set after that effort was made. No need to take into account something that cannot be undone.
Well, there should be some consideration given to the emissions created by building new infrastructure -- if that infrastructure is intended to replace existing facilities which have not reached the end of their useful lifespan. This is particularly true if one expects even more efficient options to become available by the time the existing aircraft, generation facility, truck, bus, car, etc. reaches the expected end of service. In other words, it's probably bad to junk a 5-year-old plane or car just to realize 1% more efficiency from a new one. By the same token, perhaps building a pipeline still makes sense if the overall lifetime emissions created by building the pipeline and operating it are lower than those which would occur by using less efficient methods of transporting petroleum like rail or truck.