– so small the scale of the problem is likely to have been underestimated.
‘In addition, the size range where those changes happen is the same as where air pollution becomes a health risk.’The Cambridge team used magnetism to study dust samples from ticket halls, platforms and operator cabins. They measured as little as five nanometres in diameter – too tiny to be captured by typical techniques.
‘Normally, we study magnetism as it relates to planets, but we decided to explore how those techniques could be applied to different areas, including air pollution.’ ‘The Underground is a well-defined micro-environment, so it’s an ideal place to do this type of study.’ Mr Sheikh said: ‘If you are going to answer the question of whether these particles are bad for your health, you first need to know what the particles are made of and what their properties are.’
Might be no harm to wear a good quality 😷 on there
Wearing masks under your nose is really going to help then, isn't it?