How to save the world from climate catastrophe – the IRENA study
IRENA, the International Renewable Agency, has just published a study showing how the world can meet the not-to-exceed-2°C emissions goal set by the Paris Agreement. It’s not a 100% renewables study – it still includes a little oil, gas and nuclear – but it concludes, unsurprisingly, that a massive expansion of renewable energy in all sectors will be needed between now and 2050, along with major improvements in energy efficiency, to keep the Earth within its allowable carbon budget. The study provides information on the changes that will be needed to meet this goal but provides no specifics on how they are to be met. It estimates the costs of the changes at $120 trillion (~$4 trillion/year from now to 2050, or about 5% of total world GDP) but provides no specifics on where the money is to come from. It is nevertheless confident that this massive outlay will be “dwarfed by the benefits”.
The IRENA report contains 73 pages, only 10 of which (Analysis and Insights in Key Sectors, pp. 31-40) deal with the specifics of the changes that are needed to achieve IRENA’s proposed “energy transition”. But no information is provided on how these changes are to be achieved and whether they will work if they are. Simulation models, such as those used in the Jacobson, Lappeenranta and Blakers studies, are normally used to perform this task, but IRENA seems to have by-passed this step. It has simply estimated how much renewable energy and improved energy efficiency is needed to meet the 2°C emissions goal, and the costs thereof, and it presents these estimates as achievable solutions rather than targets.
IRENA considers two scenarios. The base year for both is 2015.
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