They are: UV A - 330-400 nm - causes aging, wrinkling, and loss of elasticity of skin UV B - 290-330 nm - causes the greatest risk of skin cancer UV C - 100-290 nm - very destructive to tissues, however most is absorbed by the Earth&#146;s atmosphere before reaching ground level While sunlight is generally the primary energy source for food production by plants, it is also necessary for the human body to produce vitamin D.
(sunlight; is generally; the primary energy source for food production by plants) (UV A - 330-400 nm - causes; wrinkling; ) (it; is also; necessary) (the human body; to produce; vitamin D.)
sunlight UV A - 330-400 nm - causes it the human body
is generally wrinkling is also to produce
the primary energy source for food production by plants
necessary
vitamin D.