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Ultraviolet- Several studies indicate that very little of the nanoparticles in sunscreen can penetrate the skin and enter the body - as long as the skin is healthy and intact.
- Tests reveal that retinyl palmitate, a form of vitamin A found in 2/5th's of U.S. sunscreens, speeds the development of skin tumors when applied to the skin in the presence of sunlight.
- People using sunscreens may overestimate the protective capacities of these products.
- Designing lighting that works for everyone - young or old.
- Energy-efficient glass with a low-E coating is one of several types of insulated glass.
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