Water from the 'tap' [like our 'Green-House-Gas' or GHG
emissions] flowing into . . ' the 'bath' [like the global
atmosphere], raises the level of the bath-water [like the rate
of atmosphere GHG accumulation/concentration] . . . but, the
'bath' is also drained by . . . the 'plug-hole' [like the
natural 'sinks for GHG' . . . [affecting/slowing the rate of
atmospheric GHG accumulation]. To stop the bath over-flowing,
the tap must turned off in the knowledge that the bath level
will continue to rise while the tap is being turned off. This is
true for emissions, once the need for UNFCCC-compliance in the
form of safe and stable future GHG concentrations in the
atmosphere is accepted. An assessment of 'Contraction &
Concentrations' and 'Contraction & Convergence' and the C&C
targets and modelling behind 'sink-efficiency' in the UK
Government's 'Climate Act' . The '50:50' odds the UK Government
gave for avoiding a temperature rise globally of more than two
degrees with their emissions scenario are in this context.