Reductions in California's Urban Fossil Fuel CO<sub>2</sub> Emissions During the COVID-19 Pandemic.

While there is large variation in 14 C within each category and results indicate that heterogeneity within regions/sectors was larger than the COVID‐induced changes, there is a small trend toward higher ffCO 2 emissions in residential, open space/recreation and industrial areas, and a trend toward lower emissions from educational and public spaces.

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