The hypocrisy of National Geographic

For over 100 years National Geographic has promoted geography, world culture, archaeology, natural science, and environmental conservation.  I take exception with their promotion of environmental conservation while at the same time promoting a 24 day around the world journey by private jet.  I don't understand what part of that is environmentally conscious.  They state on their website that they have converted a jet that normally accommodates 233 people to accommodate 'just 78 people'.  Even if I factor in guides and emergency personnel the fact that they are transporting less than 40% of the plane's capacity is absurd.  Of course the plane uses less fuel (since it is not flying at capacity) and an argument could be made that were all 78 passengers to use commercial flights they would have generated more emissions.  However, those flights would have existed otherwise and this is one flight that exists on a charter basis.  I'm not even going to get into the aspect of how this trip completely misses the local color by affording it's travelers the utmost in luxuries, because I think that is what these travelers seek.  I just think that it is irresponsible and hypocritical for a company that promotes environmental conservation to also promote what is one of the most excessive vacations I have ever heard of.