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The Earth's ionosphere and sunblock or sunscreen.
"Sunblock" is also a common variant.
Sunscreens are like gel and cream. They are more popular. Chemicals found in sunscreens include PABA, Benzophenones, Cinnamates, and Salicylates. Sunblock gets UV rays and the sunblock reflects them. Chemicals in sunblocks include Titanium dioxide and zinc oxide. reference http://beauty.about.com/od/summertanning/f/sunscreenblocks.htm
The difference between sunscreen for adults and children is generally the chemical composition. A child's sunscreen will be milder for the skin and will not burn the eyes.
The Bullfrog Mosquito Coast Sunblock was tested on mosquitoes.
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By staying outdoors for one hour or more and putting on sunscreen or sunblock every hours
An opaque sunscreen will not let the sun close to you skin it will just bonce off the sunscreen. A transparent sunscreen will let the sun come through the sunscreen and will potentially burn you skin.
ok clink on the camera guy press i dont have money then he gices a pic of u an sunblock
A shop that has a skin care department or a pharmacy is a good place to buy a waterproof sunblock. A "water resistant", rather than "waterproof", sunscreen is a more accurate description when searching for one.
Sunscreen does not completely block UV rays, it merely reduces their effect, you can get a sunburn even while wearing sunblock. In addiiton it can be neuatralized or washed away by sweat, splashing water etc.