LEHR has developed a weed wacker and blower that runs on propane. All you have to do is grab one of those mini green propane tanks and twist it on. The trimmer shown above emits 96% less particulate compared to your standard gas trimmer. Just to give you an idea, running your lawn mower for an hour gives off as many pollutants as driving your car 20 miles.
Each propane tank will last about 2 hours. Unfortunately propane is still fossil fuel based but burns much cleaner. Oil is still needed in the engine and needs to be changed every so often. The trimmer weighs roughly 15 lbs, about middle of the pack compared to other trimmers out there.
The trimmers are retailing for about $200.