I’ve seen electric mowers referred to as “zero emissions,” but of course a lot of the electricity we use is generated by fossil fuels; which means the emissions exist, but they’re just happening at a power plant.
Where does my electricity come from?
I live in Northern Virginia, and my electric utility is Dominion. Dominion generates electricity mostly through nuclear, coal, and natural gas. Dominion has this pie chart on their site, explaining their sources.
The coal-burning plants have emissions, and there are also emissions with natural gas, through methane leaks. As for nuclear . . . well, I know nuclear energy has many fans, but personally I’d rather use muscle power to power my reel mower than nuclear to power an electric mower.
The Dominion report is here — the “generating facilities” link: