It is folly to throw good glass-ware into a bottle-bank, since the energy cost of reheating cullett is the same as the cost of heating the raw materials used in making glass.
(It; is; folly) (the raw materials; used; in making glass) (the energy cost of reheating cullett; is; the same as the cost of heating the raw materials)
It the raw materials the energy cost of reheating cullett
is used is
folly
in making glass
the same as the cost of heating the raw materials