41.   Most sunscreens can block out ultraviolet B radiation, the wavelength of light that causes sunburn.

42.   Once frozen in the extreme vacuum, the scientists bombarded their varied ices with intense ultraviolet radiation to mimic the radiation that molecules in space encounter from the stars.

43.   One item being considered is a water filtration system using ultraviolet radiation instead of chlorine.

44.   Others had suggested that the gas was heated by ultraviolet radiation from hot stars.

45.   One theory consistent with this idea is based on the fact that amino acids tend to decompose when they absorb ultraviolet radiation.

46.   Over time, the penetration of ultraviolet radiation went from only one foot to nearly nine feet in one acidic lake.

47.   Ozone in the stratosphere is a gas that is essential in protecting humans from carcinogenic ultraviolet radiation from the sun.

48.   Ozone in the stratosphere is essential to help protect people from carcinogenic ultraviolet radiation from the sun.

49.   Ozone in the upper atmosphere is a gas that protects humans from carcinogenic ultraviolet radiation from the sun.

50.   Ozone is a gas that collects in a thin layer in the upper atmosphere and shields the Earth from ultraviolet radiation that is devastating to many life forms.