The benefit from replacing gas trimmers with electric trimmers is massive; apparently those little tiny gas engines on lawn trimmers are horrendously inefficient and extremely polluting. There is no reason for anyone to use a gas trimmer any more; even if you have a huge amount of lawn to trim, it's more efficient to buy a few extra battery packs for your electric trimmer. Which reminds me. I saw the city government using gas trimmers in the park. I need to go talk to someone about how they really ought to switch to electric. Edit: topic about electric gardening tools, perhaps?