Robert Reid trudges around a grimy and polluted Salford in 1955 to remind us just how much of a profound effect on the nation's health the NHS had. (1955)
By Sarah Easedale
By Rajini Vaidyanathan
BBC South Asia Correspondent
By Erin Osgood
BBC Young Reporter
Young Reporter Georgia Helme investigates the impact of pollution in the River Lugg.
According to Asthma UK and the British Lung Foundation, one baby is born every two minutes into toxic air in the UK due to 29% of hospitals being located in polluted areas.
This video has been removed for rights reasons.
The actor and former governor of California, Arnold Schwarzenegger, invites the BBC's Tom Heap to Hollywood to talk about saving the planet from climate catastrophe.
A look at how India is trying to balance banishing poverty with meeting its climate commitments.
By Helen Briggs
BBC Environment correspondent