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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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kendreae kendreae
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7 years ago
Increased levels of ultraviolet light at Earth's surface 
A)  pose a threat of skin cancer to all races. 
B)  are related to an increasing rate of skin cancer. 
C)  have been identified as causing damage to oceanic life forms. 
D)  are tied to the general reduction in stratospheric ozone. 
E)   All of these are correct.
Textbook 
Geosystems: An Introduction to Physical Geography

Geosystems: An Introduction to Physical Geography


Edition: 7th
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One touch of nature makes the whole world kin.  William Shakespeare
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jo170jo170
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4 years ago
Answer: E

Everyone is exposed to UV radiation from the sun and an increasing number of people are exposed to artificial sources used in industry, commerce and recreation. Emissions from the sun include visible light, heat and UV radiation.

As sunlight passes through the atmosphere, all UVC and approximately 90% of UVB radiation is absorbed by ozone, water vapour, oxygen and carbon dioxide. UVA radiation is less affected by the atmosphere. Therefore, the UV radiation reaching the Earth’s surface is largely composed of UVA with a small UVB component.
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