We now compare the heat provided by 1 ton of coal to the heat provided by an electric heater with electricity produced by 1 ton of coal.
(We; compare; the heat provided by 1 ton of coal to the heat; T:now) (the heat; provided; by 1 ton of coal; to the heat) (the heat; provided; by an electric heater with electricity) (electricity; produced; by 1 ton of coal)
We the heat the heat electricity
compare provided provided produced
the heat provided by 1 ton of coal to the heat T:now
by 1 ton of coal to the heat
by an electric heater with electricity
by 1 ton of coal