He discovered that if just 30 people in a standard carriage with 151 passengers used their phone radiation levels exceeded the limits recommended by the International Committee for Non-Ionising Radiation.

BBC: Trains 'trap mobile phone radiation'

Ironically, because past research studying the after-effects of exposure to things like atom bombs and radiation treatments for cancer suggests the most important environmental risk factor for meningiomas is ionising radiation.

ECONOMIST: Confirmation that dental X-rays can be bad for you