A report by the IPCC finds that close to 80% of the world‘s energy supply could be met by renewables by mid-century if backed by the right enabling public policies. It argues that the that the rising penetration of renewable energies could lead to cumulative greenhouse gas savings equivalent to 220 to 560 Gigatonnes of carbon dioxide (GtC02eq) between 2010 and 2050. The upper end of the scenarios assessed, representing a cut of around a third in greenhouse gas emissions from business-as-usual projections, could assist in keeping concentrations of greenhouse gases at 450 parts per million.
A report by the IPCC finds that close to 80% of the world‘s energy supply could be met by renewables by mid-century if backed by the right enabling public policies. It argues that the that the rising penetration of renewable energies could lead to cumulative greenhouse gas savings equivalent to 220 to 560 Gigatonnes of carbon dioxide (GtC02eq) between 2010 and 2050. The upper end of the scenarios assessed, representing a cut of around a third in greenhouse gas emissions from business-as-usual projections, could assist in keeping concentrations of greenhouse gases at 450 parts per million.
The findings of this 1000 page report are contained in a summary for policymakers of the Special Report on Renewable Energy Sources and Climate Change Mitigation (SRREN).
The six renewable energy technologies reviewed are:
- Bioenergy, including energy crops; forest, agricultural and livestock residues and so called second generation biofuels
- Direct solar energy including photovoltaics and concentrating solar power
- Geothermal energy, based on heat extraction from the Earth‘s interior
- Hydropower, including run-of-river, in-stream or dam projects with reservoirs
- Ocean energy, ranging from barrages to ocean currents and ones which harness temperature differences in the marine realm
- Wind energy, including on- and offshore systems
Over 160 existing scientific scenarios on the possible penetration of renewables by 2050, alongside environmental and social implications, were reviewed, with four, chosen to represent the full range, analyzed in-depth.
Key findings are as follows:
The Summary for Policy Makers (26 pages) is attached below. See here for coverage in The Guardian and here for the New York Times
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