Read the passage and choose the best heading in the box for each paragraph. There are three extra ones that should not be used.
A. How to maximize the SPF of suncreens
B. Summer sport and skin protection
C. How the various types of radiation differ?
D. Sunscreens: the higher the SPF the better?
E. What is ultraviolet radiation?
F. Other ways to protect yourself
G. What are the first signs of skin cancer?
H. A short break in the sun won’t hurt, will it?
1.___________
Sunshine contains three different bans of ultraviolet radiation: UVA, UVB and UVC. Although UVC is the most dangerous, because it is a shorter-wavelength radiation than UVA and UVB, it is screened out by the Earth’s ozone layer. UVA used to be thought less dangerous than UVB, but it is now known that both bands can cause skin cancer. It is UVB which causes sunburn. However, both UVA and UVB can age the skin prematurely.
