Redirecting innovation from dirty to clean technologies reduces the cost of environmental policies and can lead to higher economic growth in the short run, if the benefits from higher spillovers exceed these costs. This financial effort needs nevertheless to be sustained and accelerated, if indeed the objective of a near-zero-GHG emission electricity production is maintained. The commitment made by the 22 countries (and the EU) under the Mission Innovation, to double their public financing for low-carbon energy RD&D is therefore crucial and may need to be strengthened even further in the future.