Mowing the green way always starts with an electric lawnmower. Electric models do not emit smog like their gasoline brothers and are very quiet. Instead of a gasoline engine block, these mowers have an electric motor. The motor is directly connected to the blade, spinning it around at high speed. The most popular type of electric lawn mower gets its power from an extension cord. This cord is plugged into your exterior wall outlet and moved around as needed. Lawn mowers like this can be paired with extension cords up to 100 feet in length. The problem that some people have with these models is the hassle of moving the cable around. It is important to not run over it.
There are models which are electric and do not use an extension cord. These ones use a battery pack, usually NiCD or Li-Ion batteries. The lawnmower sits in your garage plugged into a charger. The charging time varies but can be approximated to 12-14 hours. Run times for a charged battery average 1.5 hours. While heavier than a corded electric lawn mower, you get plenty of maneuverability around the yard. The downside is that battery powered mowers are suitable for lighter jobs, such as the maintenance of a small to medium yard. Users should not let their grass grow tall, or else the mower may have difficulty. Cutting through thick brush and weeds may not be possible with a mower such as this.
Robotic lawnmowers are part of a new generation of mowers. Using onboard sensors and a computer, these mowers make their way across the lawn all on their own. They are contained by boundary wire which the user installs. Basic ones can cut one lawn, while advanced ones can handle more than one. Whether you trust such a device is up to you.
Since electric lawn mowers emit no direct CO2, you are doing the world a favor. It is for this reason why they are often considered to be the best lawn mower. While they still use artificially generated energy, their total consumption is a lot less. The gasoline you buy can now be exclusively reserved for your car.