I think you’re missing the wider context here. Problems at these hospitals’ maternity departments have been under investigation for years at this point, and the scope of the inquiry has been widened several times in the process. The link is to a UK newspaper, and the context is very well known in the UK at this point and wouldn’t be repeated in every article.
Some background: https://www.bbc.com/news/uk-england-shropshire-46206917
Pollution doesn’t cause babies to die from medical neglect during labour.