Why is restaurant not safe to eat at

Restaurants could be unsafe to eat at for a number of reasons. They could be unsanitary, for one. Or, the food itself might not be healthy. (:

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.