Two countries with the same Responsibility and Capacity Index (or RCI) and thus the same mitigation obligation would have different emission allocations in a given year — say 2020 — if they had different
BAU emissions projections for that year.
Not exact matches
Figure 3 accounts for the lower observed GHG
emissions than in the IPCC
BAU projection, and compares its «Best» adjusted
projection with the observed global surface warming since 1990.
These studies compare a particular climate policy scenario with a reference scenario corresponding to the model
projection of business as usual (
BAU)-- that is, a world in which the economy continues on its current course with carbon
emissions unchecked.
Making a (less radical) 70 % cut in ff energy
emissions by 2050 means being asked to replace 17 GtC of «economic» demand in energy at 2050 with something else over and above the
bau energy mix
projections.