energy efficient lawn mowers
Traditional gas lawn mowers are very energy-inefficient and are responsible for about 5% of the world's pollution (EPA data)… To reduce such an environmental load and for energy savings consider new gas lawn mowers and, most of all, electric, manual, solar-hybrid and propane lawn mowers.
New gas lawn mowers are much more energy-efficient than traditional models. In the United States, since 2012, new gas mowers have to meet the EPA gas emissions standards, and some mower manufacturers – namely Honda – are offering them for some years now.
Anyway, even with the new and much more energy-efficient engines, gas mowers remain polluting and their running costs are still high.
Electric lawn mowers are the most direct and popular alternative to them, but you may also want to consider manual lawn mowers or hybrid electric-solar mowers.
Electric lawn mowers vs. gas mowers
Like gas lawn mowers, new electric lawn mowers can be self-propelled or of push type and have some significant advantages over gas mowers. They are more-energy efficient and much quieter, and perform well in many types of lawns, but they do not perform so well in ill-kept lawns with thick grass and weeds, or in very large lawns.
See, for details: Electric Mowers vs. Gas Mowers and Self-propelled Propelled vs. Push Mowers
Manual lawn mower vs. electric lawn mowers
If you are physically fit enough and you like some exercise, and your lawn is small and without weeds or other troublesome obstacles, consider a good manual lawn mower. Manual reel lawn mowers can be an excellent solution for small and well-kept lawns (up to, say, 1/3 acres).
Top lawn Mower manufacturers
Honda, Huskvarna, Toro or Craftsman are major and well-known brands in gas mowers, while Black & Decker has the best ratings in electric mowers. But there are other top lawn mower manufacturers. See, for details: Top Lawn Mower Manufacturers
Propane lawn mowers
Propane mowers are more energy-efficient than gas or even many electric mowers. But they demand an expensive investment and are aimed to large and commercial lawns. See: New Propane Lawn Mowers
Eco-friendly hybrid lawn mowers
If you want to reduce your energy bills and an environmentally-friendly mowing solution consider the hybrid electric-solar mowers. See: Hybrid Electric-Solar Mowers.
Beyond the Energy-Efficiency of the mowers
Lawn mowers come with different horsepower and different features to respond to different needs. Your climate, the type of lawn and its size, your goals and aims, your physical fitness and the amount of physical effort you want to consider, all are important elements that shape the final choice. See: Self-propelled Propelled vs. Push Mowers and The Best of Mowers.