The study used satellite data on impervious surfaces to estimate how much of the country is covered by bermudagrass, St. Augustine, fescue and other turfgrass. The study defined lawns as residential and commercial landscapes, golf courses and other turf-covered areas.

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Ecological Impact of Lawns

Recognizing that different people and businesses treat their lawns differently, she had a computer simulate the effect on the water cycle and carbon cycle of different lawn management techniques. The variables the models tested included watering a fixed amount (including rainfall) versus watering according to weather and evaporation rates, adding different amounts of fertilizer, and leaving the clippings on the lawn after mowing or bagging them up.

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