No, alternative energy would to use a lawn mower that you had to physically push and pull across your lawn (not electricity, battery or mains), no gas, or petrol, no solar. Just by using physical human power of building up a sweat, and wishing you had not left the lawn grass to grow so tall! it is so easy to say I'll mow the lawn tomorrow, and we all reluctant gardeners, know that tomorrow never comes (until the wife puts her foot down!)