Presumably, adverse impacts and effective adaptation measures would vary among the scenarios from different families that share
similar cumulative emissions but have different demographic, socio - economic and technological driving forces.
Section 7.4.1.2 told us that if we kept on emitting CO2 and more - than tripled present
cumulative CO2
emissions (to 2,000 GtC) we could then be the unhappy recipients of a
similar quantity of CH4 although we would have to wait for it all to arrive — 1,000 to 100,000 years for potentially ~ 2,000 GtCH4, an equivilant of 50 «Shakhova events».