"Ornamental grass" usually refers to tall, decorative grass which typically uses far less water than green turf. Some species are native to Nevada. The restriction seems to apply just to nonfunctional green turf which serves only an ornamental purpose. If you live in drought country, the distinction is important.
I wonder if the restriction applies to low-water turf such as Buffalo Grass, or if it only applies to water hogs like Kentucky Bluegrass.
By the way, the misleading headline came from TFA, so I can't blame BeauHD.
The data don't have to be perfect. Let's say there was only a 1-in-3 chance that universal mask wearing would significantly reduce the infection rate across society. Would I be willing to put up with minor inconvenience, to give you--or, if you're young and think that you're immortal, your grandparents--a lower chance of dying a horrible death? Of course.
Apparently there is some evidence that far UVC wavelengths (207-222 nm) are absorbed by the outer layers of skin before the light can do any damage. See for example this February 2018 article in Nature. I'd want to see some pretty solid evidence before trusting this, however. What are the effects on eyes? Mucous membranes?
It seems that businesses are focusing on preventing COVID-19 transmission via fomites (contaminated surfaces) because that is relatively easy to do. But once good hand hygiene is in place, transmission from asymptomatic individuals via coarse droplets, fine droplets, and perhaps aerosols is the risk which really needs to be addressed.
Comparing information and knowledge is like asking whether the fatness of a pig is more or less green than the designated hitter rule." -- David Guaspari