We have to take a step back; we have to recognise that during the course of one lifetime, the human population has quadrupled and our use of fossil fuels, our energy consumption, has grown enormously.
Vi må træde et skridt tilbage og erkende, at verdens befolkning i løbet af en menneskealder er firdoblet, og at vores brug af fossile brændstoffer, vores energiforbrug, er steget voldsomt.