Recycling leads to an increase in biomass available when compared
to virgin based production chains. Current life-cycle methods
often do not incorporate this increase. We investigate the effect
of limiting resources on the energy use and CO2 emissions of
paper production for the three different pulp types. We expand
the system boundaries and assume the same feedstock use for
each production chain (i.e. the feedstock use for chemical pulping).
Surplus feedstock is assumed to be converted into energy.
The inclusion of surplus biomass in our system boundaries leads
to a decrease in CO2 emissions in mechanical and recovered pulping
(