SRES scenarios for global climate change

Story line Description (Source: IPCC, 2000)

A1 Very rapid economic growth; population peaks mid-century; social, cultural and economic convergence among regions; market mechanisms dominate. Subdivisions: A1FI – reliance on fossil fuels; A1T – reliance on non-fossil fuels; A1B a balance across all fuel sources
A2 Self-reliance; preservation of local identities; continuously increasing population; economic growth on regional scales
B1 Clean and efficient technologies; reduction in material use; global solutions to economic, social and environmental sustainability; improved equity; population peaks mid-century
B2 Local solutions to sustainability; continuously increasing population at a lower rate than in A2; less rapid technological change than in B1 and A1