Des Moines Register, IA 04-29-07 Earth can't support lifestyles "Simply plugging in 'renewable resources' to replace fossil resources is not enough. The world just cannot support the level of energy use that the current 'developed' nations enjoy. Either we change our lifestyle to reduce inputs, or we diminish our numbers. Attempting to grow the supply side of energy or any other of a suite of resources will fail in the long haul because we are up against the ultimate carrying capacity of the Earth. If we ignore this fact and the current warning signs, Mother Nature will make the choice of us." Steven Fales, professor agronomy and associate director, Office of Biorenewables Programs, Iowa State University. Discuss energy issues with our Biofuels Brain Bank at DesMoinesRegister.com/Biofuels.