Different senarios

• IPCC uses 35 senarios for future world growth, divided into 4 families:

  • A1 family - rapid economic growth, reduction in regional variations in wealth; global population rises then declines; new efficient technology rapidly introduced. (A1FI - continuation of fossil fuels as main energy source)
  • B1 family - moves from production towards service economy; population growth as A1; clean efficient technologies introduced
  • A2 family - remains heterogeneous with regional identity; population rises continuously; less rapid introduction of new efficient technologies
  • B2 family - economic and technological developments less; increasing population but slower than A2