it has to be own by the person trading it in for atleast 1 year and to be insured for that year ...and after the deal it must become scrap.. and sent for scraping//and not to be on the road again.
That seems incredibly wasteful to me. Removing perfectly fine cars from the road to crunch them and/or bury their parts-stripped remains in a landfill?
Oh I forgot - selling more fuel efficient cars will someday make up for it.