"We should all know by now that lawns of green grass aren't so "green" for the environment. Keeping turf from turning brown wastes water; people use too much pesticide and herbicide, toxic chemicals that can contaminate the fish we eat and water we drink. And keeping lawns at a reasonable height burns fossil fuels, releasing greenhouse gases and other pollutants into the atmosphere. Now a new study in Geophysical Research Letters shows that turf causes yet another problem, this time from the fertilizer spread to keep grass growing."
Read more: [smithsonianmag.com]

Use a scythe, an electric lawnmower with a long extension cord, or one battery operated. A scythe is good exercise and great for the environment. The mower with an extension cord is inexpensive to buy and operate, and does not pollute with gas and oil fumes emitting CO2, NOx and smoke particulates. Battery operated mowers are much better for the environment than a gas mower, but are not as good as a scythe or mower with cord.

According to [sites.psu.edu]
"Every weekend in the United States, fifty-four million Americans mow their lawns, which uses eight-hundred million gallons of gas per year [Springfels n.pag]. When broken down, that’s about 15 million gallons of gasoline to cut our yards and businesses alone. The eight-hundred million gallons of gas used each weekend is accompanied by the seventeen million gallons of gasoline we spill just filling up our tanks of gas each year, this amount is more than the amount of oil that was spilled by the Exxon Valdez [Springfels n.pag]."

This post was a first a comment, which @FrayedBear ask me to post for everyone. [agnostic.com]