Neither of which is nearly as good for the environment as simply using less energy. Solar panels and electric vehicles take a lot of energy to make, and are not guarenteed to become carbon neutral during their usable life.
You could be very picky about sourcing food, and put the farmers using cheap but unsustainable methods out of business. Pay the premium for American-made products under American factory emissions regulations, to shut down some cargo ships and Chinese smokestacks. Every 5th American could be a $96k/yr researcher working on environmental problems, etc. We could all telecommute, and have our pay docked by $24k/year to compensate for the lost productivity.