We know how to fight air pollution. So why leave so many to die? | Harry Quilter-Pinner

We seem unwilling to make the big changes necessary. Michael Gove must use the crisis to change the way we now liveWhat if the water that came out of your taps made you – and thousands of others – ill? How would people respond? Voters would quite rightly demand that the government act decisively to address the problem. Heads would roll in the boardrooms of the big water companies. And demand for alternatives such as bottled water would spike. Yet scientists and campaigners