Fuel combustion is responsible for most of the sulfur dioxide and nitrogen oxides released from pulp and
paper mills. In almost all cases, when you reduce energy consumption, you lower fuel use. The fuel
savings may be at the mill or elsewhere (at the power plant from which the mill buys electricity, for
instance). All other things being equal, the amount of SO2 released from the burning of fuels is directly
proportional to the amounts of fuel burned. NOX emissions are usually more related to combustion
conditions, and thus, unless combustion conditions become more favorable to NOx formation as fuel use
is decreased (unlikely), NOx emissions should remain constant or decrease as fuel use decreases.
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