?What is emission trajectory of the Greenhouse Gases for the future

Intergovemental Panel on Climate Change (IPCC) establishes different scenario emissions of greenhouse gases namely IPCC SRES Scenarios. These IPCC SRES Scenarios are defined for different social, technological, economic, demographic, and environmental developments, which are labeled A1 (A1B, A1T, A1FI), B1, A2, and B2. The A1 storyline assumes a world of very rapid economic growth, a global population that peaks in mid-century and rapid introduction of new and more efficient technologies. A1 is divided into three groups that describe alteative directions of technological change: fossil intensive (A1FI), non-fossil energy resources (A1T) and a balance across all sources (A1B). B1 describes a convergent world, with the same global population as A1, but with more rapid changes in economic structures toward a service and information economy. B2 describes a world with intermediate population and economic growth, emphasizing local solutions to economic, social, and environmental sustainability. A2 describes a very heterogeneous world with high population growth, slow economic development and slow technological change.