"Roger Coppock" <rcoppock@adnc.com> wrote in message news:1183903068.029728.292210@z28g2000prd.googlegroups.com... On Jul 8, 4:49 am, J-Roc <j...@nospam.com> wrote: Doc docsavag...@yahoo.com said: Okay, so they use less gas - but what about manufacturing of all the components - they still incorporate steel and I assume other metals, plastic, glass, petroleum products,