HEPA filters capture more than 99.97 percent of particles larger than half a micron, and ultraviolet light kills common bacteria, molds and fungi, as well as anthrax spores.
Short version: Ultraviolet light kills bacteria.
Algae require some sunlight to survive, but too much light kills them.
It also gave out the Clear Bi-light, a photo light therapy treatment system whose blue light kills acne-causing bacteria while the red stimulates collagen production and cellular repair.
Exposure to light kills riboflavin.
In western Switzerland, two passenger trains collided July 29 when one passed a red light, killing a driver.
Nonetheless, they periodically pulled off the road into a lay-by and waited – lights killed – in the gloom.
The protest erupted after three students were knocked down by a truck that ran a red light, killing two and putting one in a coma, students involved in the protest said.
The K'iche'-led army entered K'oja at first light, killed Tekum Sik'om and captured his son.
