Uh-oh, these research findings are not a surprise. A study conducted in 6 U.S. metro areas found that as income levels go up, peer pressure to apply pesticides on lawns increases. As well as to irrigate lawns and apply fertilizers. One can definitely see this in the NYC metro area - the wealthier the neighborhood, the more monochromatic fake-looking lawns. Some even keep their pesticide lawn signs on the lawn for days as a status symbol.
This has an incredibly large environmental impact because lawns can be thought of as the biggest crop in the USA. Lawns cover the most area (ahead of corn) and many lawns have intense chemical management (many have pesticides applied every month for most months of the year). Yikes!
Unfortunately, every year more evidence is accumulating of the harmful health effects of pesticides - in humans, pets, wildlife, water, air, and soil. Harmful effects include neurological and immunological effects, endocrine disruption, cancers, and birth defects. Fertilizers and water irrigation of lawns (sprinkler systems) also have a set of problems, including algae blooms in water and depletion of fresh water resources. [See posts on pesticides.]
And of course, last, but not least, pesticides disrupt the microbial life of the soil, as well as kill insects and worms. I will never forget young children in a classroom being shocked by all the worms found in good soil (in a bucket of organic dirt from my yard) - they had never seen them in their chemically managed yards.
Bottom line: Be a trend-setter in your neighborhood and embrace the natural wildflowers
weeds in your lawn. Think of it this way: clover and dandelions can't give you cancer, but pesticides can. In addition, studies find that untreated lawns result in diversity of grasses growing in the lawn and are also important bee habitats for all sorts of bee species. All positive.