Scenarios Hypothesis
A1 Very rapid economic growth
Global population reaches 9 billion in 2050 then decreases thereafter
Rapid introduction of new and more efficient technologies
A1F1 (massive use of fossil fuels);
A1T (a strong call on non-fossil sources)
A1B (balanced call on various energy sources without heavily relying on one in particular)
A2 World population reaches 15 billion people in 2100, and rising
Economic growth and spread of new efficient technology changes fragmented and slower
• High emissions at regional level
B1 World population reaches 9 billion people in 2050 then decreases
Economy is dominated by services and informational technologies
Addressing economic, social, and environmental problems
B2 World population reaches more than 10.4 billion people in 2100 and increasing at a slow rate
Intermediate levels of economic development
Development and spread of new technologies uneven and slower than for B1 or A1
Low emissions at regional level
(Source: SRES, IPCC, 2007)
Table 1: IPCC climate change scenarios