In the version of the article originally published, incorrect data were listed in the Source Data for Extended Data Fig. 6. A typographical error in Fig. 1n Source Data file was also present. Both errors have been amended in the HTML and PDF versions of the article.
A study reveals that London commuters frequently experience stress and tiredness linked to pollution and prolonged exposure to the Underground's challenging environment, impacting their eye health.
"To harm a person is to receive something from him. And what have we gained when we have done harm? We've gained in importance. We have expanded. We have filled an emptiness in ourselves by creating one in somebody else."