Review of existing emissions pathways and evaluation of decarbonisation rates (C1)

Achieving deep reductions in greenhouse gas (GHG) emissions is required to limit the risks we face from climate change.  This assessment presents an overview of recent studies examining GHG emission pathways that are compatible with limiting average global temperature rise to levels close to 2°C or at least below 2.5°C by 2100.  In particular, the major socio-economic input assumptions and major outputs (technology changes, changes in energy demand, share of fossil and alternative energy sources, costs of reducing GHGs, and other implications such as air quality) are concisely compared.

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