We have all had the feeling of climbing into a car and knowing, instantly, that it’s brand new. That scent has a name – dubbed, not so originally, ‘new car smell’ – and it’s one that I avoid like the plague because it is actually a warning sign. When it reaches our nostrils, it means that millions upon millions of tiny particles are being released from newly manufactured materials and making their way into our throats, lungs, bloodstream and even brains.