People downvote you but there&#x27;s definitely some truth there to find.<p>Thing about these projects is long-term gain. Maybe these toilets will pay off in 20-30 years, they have to, if they want to be sustainable.<p>But yes, a single plane flight would negate all of the savings. It definitely negates all of the energy you save by showering with cold water, by recycling, by turning of the light.<p>It is definitely a gigantic problem when India, China, Africa turn into energy hungry giants that already are Germany, USA, UK etc.<p>We&#x27;ll see how it all will turn out to be, business seems as usual, hope that&#x27;s going to change fast.<p><a href="http:&#x2F;&#x2F;www.withouthotair.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.withouthotair.com&#x2F;</a><p>A great book that describes how simple and easy it is to analyse sustainability - purely by numbers.