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2. Global energy review 2020: The impacts of the Covid-19 crisis on global energy demand and CO2 emissions;IEA,2020
3. Renewable capacity statistics 2020;IRENA,2020
4. Global energy review 2019: The latest trends in energy and emissions in 2019;IEA,2020
5. US building energy efficiency and flexibility as an electric grid resource;Langevin;Joule,2021