Substantial

Wiatros-Motyka and her colleagues counted emissions from the power sector using data on electricity generation throughout the first half of 2023, looking at 78 countries representing 92 per cent of electricity demand. They estimated emissions for other countries using historical data. According to their report, a substantial jump in wind and solar generation, as well as lower demand for energy,  led to a decrease in emissions in many places. This included a 17 per cent decline in the European Union, a 12 per cent decline in Japan and an 8.6 per cent decline in the US.
–New Scientist