Discussion The inconsistencies appear to be rooted in
subjective choices and different system boundaries and
lifetime, rather than lack of standardisation. If included, the
amounts of emissions of sulphur hexafluoride (SF6) and
nitrogen trifluoride (NF3) are crucial to the GWP100 in the
various life cycle phases for a desktop using liquid crystal
display (LCD) screen. Another important observation is that
the MEEuP methodology report/tool underestimates the
GWP100 of electronic component manufacturing processes.
Conclusions Between 1997 and 2010, the ISO 14040/44
standards have ensured a rather consistent set of GWP100
results for the studied products. However, the lack of
transparency for consumer electronics LCAs sometimes
makes benchmarking difficult. It is nevertheless possible to
compare new LCA calculations to existing studies. It is also
possible to reveal which product studies are consistent with
studies of submaterials and subcomponents. In most cases,
the GWP100 results for consumer electronics are consistent.
Based on the survey of published work, recycling and
other end-of-life processes have a tiny share of the total
GWP100 score for consumer electronics.