use 6 x 12 aluminum rectangular tubing.
the earth regenerates itself every 10,000 yrs. or so,and we are past due.
No,somebody will buy all rights to it and put it on a shelf and lock the door.GM did that several yrs. ago with an engine built to run on fresh water.
If there is GLOBAL WARMING why is there 8" of snow at my house in ALABAMA....HAHAHAHA
just saw this on e-bay....