What is the primary advantage of using cellulosic feedstocks over crops like corn to produce ethanol?

W) The enzymes that produce cellulosic ethanol are cheap and plentiful

X) There are more cellulosic ethanol plants than corn ethanol plants

Y) Waste products can be used as cellulosic feedstocks

Z) Cellulosic ethanol production does not require government subsidies to be economically competitive
Y) WASTE PRODUCTS CAN BE USED AS CELLULulosic FEEDSTOCKS