ultra violet radiation造句

• That atmospheric layer protects the earth from harmful ultra violet radiation that can cause skin cancer.
• Vitamin D3, or cholecalciferol, is formed in the skin after exposure to sunlight or ultra violet radiation.
• "Every 1 percent drop in ozone means roughly 1.3 percent more ultra violet radiation reaching the surface, " said Bojkov.
• "Every 1 percent drop in ozone means roughly 1 . 3 percent more ultra violet radiation reaching the surface, " said Bojkov.
• "Every one percent drop in ozone means roughly 1.3 percent to 1.5 percent more ultra violet radiation reaching the surface, " said Bojkov.
• He said each 1 percent increase in ultra violet radiation is thought to increases chances of skin cancer and eye cataracts by 2 percent.
• He said each 1 percent increase in ultra violet radiation is thought to increase chances of skin cancer and eye cataracts by 2 percent.
• Ozone forms a protective layer about 60 miles above the earth which prevents excessive ultra violet radiation from the sun penetrating to the earth's surface.
• Since the ozone depletion began there has been a 13 to 15 percent increase in ultra violet radiation in Europe and North America, Bojkov said.
• Doctors and biologists have estimated that each 1 percent increase in ultra violet radiation will cause a 2 percent increase in skin cancer and eye cataracts.
• "Every one percent drop in ozone means roughly 1 . 3 percent to 1 . 5 percent more ultra violet radiation reaching the surface, " said Bojkov.
• For two days, Sept . 9-10, the hole extended over the southern Chile city of Punta Arenas, exposing residents to very high levels of ultra violet radiation.
• State scientists say, however, the decline in frogs and other amphibians across the high mountain West is more likely because of increases in ultra violet radiation than trout feeding.
• Ozone levels plummeted to record lows in Britain and Scandinavia this winter, exposing inhabitants to some of the worst levels of harmful ultra violet radiation seen in densely populated areas.
• For two days, Sept . 9-10, the hole extended over Punta Arenas, a southern Chile city of about 120, 000 people, exposing residents to very high levels of ultra violet radiation.
• Cellon was used with the intention of making the aircraft partially transparent and so less visible; however, the Cellon reflected sunlight, making the aircraft more visible, before quickly yellowing due to the effect of ultra violet radiation.
• Over the years, rain, wind and ultra violet radiation breaks down the waterproofing coating of roof tiles causing water seepage through the porous tiles resulting in leaks and damage to roof trusses, ceiling boards and cornices and also giving rise to the spread of fungus, algae, grim and dirt.