Is it greener to be on or off the grid?

power lines

AsymptoticLife, who is increasingly off the grid, says maybe it’s greener to be on the grid rather than totally off it, because then you can feed excess energy back into it so others can use it too.

Indeed. If millions of households created their own renewable energy with solar, wind, hydro, and sent the extra back to be used by anyone, then far fewer old school, carbon-spewing power plants would be needed.