The plants would use low-value materials like switch grass, wheat straw and wood chips.
Just be sure the pots are a stable shape: full-grown switch grass can trap a lot of wind.
And it can work on material that is not currently considered a crop, like switch grass or wood chips left over from paper making.
In 2009, the district began using locally grown switch grass as the fuel in a biomass boiler to heat the school facilities.
American switch grass is another crop that may find its way to electric power plants.
And yes, ethanol can be made from switch grass, which grows in abundance on the prairies of the Great Plains.
Let's not forget that switch grass is beautiful and looks great in floral arrangements.
The handbook strongly recommended switch grass as part of a perennial border.
But increasingly we'll probably be making ethanol from switch grass or sugar cane in ways that are more likely to save petroleum.
President Bush has promoted crops like switch grass, as having the potential to increase ethanol supply sharply.