65I've invented a 100% efficient combustion engineposted 9 months ago by18107@aussie.zonein science_memes@mander.xyzView comments27 commentssavehidereportI use it to heat my house. Sort:HotTopControversialNewOldYou are viewing a single thread.View all comments View context [ +- ]Dieinahole@kbin.social10 points9 months agoYou. Come sell my book permalinksavereportparentreply