There are babies, sick people and elderly people who need naps, but can't get them because of all the noise from these machines.
If you reasearch noise and health, you will find that loud noise has a real and serious effect on human health.
The emissions from lawn mowers are pollutants. They contribute to gound-level ozone and cause smog. Ozone is harmful to human respiratory systems and ecosystems.
Your lawn does not need to look perfect. Good enough is best for the earth and everyone's health. Hand and electric powered mowers do a good enough job, and everyone and everything benefits.
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