If you want to read about the benefit of wearing a helmet while
riding a bicycle, all you have to do is research the matter.

Go he

No, go he

(someone competent has done it for us)

URL:http://www.scottish.parliament.uk/ms.../groups/cycle-
docs/helmet-legis-commentary.pdf

Shorter link to it:
URL:http://qurl.com/efe7v7