What’s the modern equivalent of the now largely obsolete ‘at the coalface’?

Welsh miners at work, circa 1955. Photograph: Hulton Archive/Getty Images

Now that most of our coal pits are either closed or will be in the not-too-distant future, what’s the environmental equivalent of “at the coalface”?

Peter Hanson, Whitestone, Devon

• Post your answers – and new questions – below or email them to nq@theguardian.com