forage plants to the ground; in the 1700s, peasants and slaves wielded machetes and scythes. According to NASA satellite images, the United States is blanketed in approximately 50 million acres of turf, with several hundred thousand acres of grass being added each year.
All that mowing, trimming and blowing contributes up to 10 percent of our nation’s air pollution every summer in the form of hydrocarbons (a major component of smog), particulate matter (which damages respiratory systems), carbon monoxide (a poisonous gas) and carbon dioxide (a greenhouse gas that contributes to global warming). Gas-powered lawn mowers, blowers and trimmers are 10 to 30 times more polluting than combustion-engine automobiles and, well, we all know where the car industry is headed.
It should come as no surprise, then, that today’s Elwood McGuires are waging a new race: to develop kinder, gentler technologies for taming America’s little green patches of paradise. Like it or not, the grass is still growing. More and more folks are mowing it with machines that are human- or electricity-powered. A new campaign co-promoted by the non-profit SafeLawns.org of Washington, D.C., and the for-profit Black & Decker company of Maryland challenges homeowners everywhere to “Get Your Grass Off Gas.”
The statistics in support of the change are staggering. A traditional mower running for 45 minutes consumes about 50,000 BTUs of energy in the form of gasoline. An electric mower doing the same job requires just 2,500 BTUs in form of kilowatts. Some estimates put the electric mowers at 90 percent less polluting than gas models and the cost savings per season is ample. About $5 of electricity will run your electric mower for the whole season on a third-acre lawn that would otherwise require about $40 to $50 in gas and oil.
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