My solar-powered and self-hosted website

I can't speak for his specific apartment, but apartments in general are more energy efficient that a suburban house. New York City is one of the lowest per capita CO2 emissions in the US.

I can believe it either way, but some of that is because carbon-intensive industry will be based out of the city and its products imported in.

I doubt there’s a cement kiln, cattle farm or oil refinery within city limits.

These figures are generally based on consumption rather than production for that reason. It’s not helpful to credit emissions to the people who largely aren’t driving the output.

City living brings efficiencies from operating at scale - fewer miles by car, block of apartments instead of single family homes.