Over at Philly.com, this is what they're saying about gas-powered mowers:

Gas-guzzling mowers are so polluting that some local air quality districts have even offered rebates allowing people to turn in their old gas mower for a new, leaner lawnmower at a slashed price.

"It's really amazing how much these older engines pollute," says Sam Atwood, spokesman for the South Coast Air Quality Management District, which monitors and combats air pollution around the Los Angeles area. "Just one of these older two-stroke gas mowers can pollute over the course of the year as much as 43 new cars each driven 12,000 miles."

For the past six years, AQMD has collected more than 24,000 gas-powered mowers and - for as little as $100 - exchanged them with electric lawnmowers, which will eliminate 116 tons of smog-forming compounds over several years. For most of the exchange program, AQMD has chosen the Neuton cordless electric mower, which is equal in power to a 3.5-horsepower gas mower, has a 14-inch blade width and can operate for up to an hour on a 12-hour charge. It also produces half the noise of a gas mower and only weighs about 48 pounds.

"It's extremely easy to use," Atwood says. "Just push in an electrical safety key, pull a lever and go. We have found very good customer satisfaction with the product. Another nice thing about the Neuton is that you can open a plastic cover on top of the mower, pull out the battery and charge it overnight."

You can find your local air quality management district here. Call them up and ask them to sponsor a gas mower-for-Neuton exchange in your neighborhood!