Colors fade and plastics crack after long exposure to UV radiation. It can damage crops and microscopic plants in the oceans. It can contribute to air pollution through photochemical smog. Most ultraviolet radiation from the Sun is blocked by ozone in Earth's upper atmosphere. Glass, most plastics, special UV-absorbing films, sunglasses, and sunscreens absorb UV photons.
Clothing provides shade from UV radiation.
You can test the effectiveness of these articles by using them on your UV Detecting Beads. Ultraviolet Waves from the Student's Site. Ozone Teacher's Guide from NASA's Observatorium. Top of page . Linda Martel 3 DEC 99.