I posit that if every Canadian driver made a commitment to burn one litre less gasoline per week it would do more good for the environment than all the blathering of militant academics.  I do not have a crystal ball so cannot pretend to know the future.  All I have to go on are the facts available to all.  How future people will make steel or fly planes is a mystery to both you and I, if we're honest.  And yes, I know about ostriches but it is a common analogy that even the dimmest protester can readily comprehend(I hope, sigh).