IPCC scenarios of future emissions
B2
A2
2: continuously increasing population
B1
A1FI: fossil intensive
A1T: non-fossil intensive
A1B: balance of F&T
1: global population levels off,
declines after 2050
B: faster conversion to clean
& efficient technologies
A: slower conversion to clean &
efficient technologies
IS92a: business as usual (extrapolation from current rates of
increase)
