[...] It's used by more than half of Brazilian cars and it's generally cheaper than gasoline, without any subsidies.
It is cheaper "per liter", not "per kilometer", unfortunatelly. Until 2 years ago I would fill my car's tank with ethanol only. Now I use gasoline because the cost per kilometer is lower with gasoline.
Hopefully the price of ethanol here in Brazil won't rise too much, thanks to the larger demand.
You don't live in Brazil, do you? We already had a big rise in the ethanol price because of the international price of sugar. Sugar cane farmers prefer to turn their crops into sugar than into ethanol for bigger profits. If the demand on the ethanol increases, it will be more expensive than gasoline PER LITER!
[...] and that pi is bigger than 3. I wouldn't believe a scientist!
Sorry, but PI *ACTUALLY* is 4: http://28.media.tumblr.com/tumblr_lbxrvcK4pk1qbylvso1_400.png
A successful [software] tool is one that was used to do something undreamed of by its author. -- S. C. Johnson