Pennsylvania's natural gas drillers are still flushing vast quantities of contaminated wastewater into rivers that supply drinking water, despite major progress by the industry over the past year in curtailing the practice.

On Friday 25 March, environmental activist Lewis Pugh delivered a passionate call to action at a public lecture in Cape Town. He implored South Africans to stand up for our rights – particularly the right to water, and the right to a healthy environment – and take on corporate bullies like Shell. If you care about the Karoo, if you care about our country, keep reading...

The bromides themselves are not a public health risk - they account for a tiny part of the salty dissolved solids that create an unpleasant taste in water at elevated levels.  ...But bromides react with the chlorine disinfectants used by drinking water to form brominated trihalomethanes (THMs), a volatile organic compound.