Sphagnum a sustainable substitute in growing media. Coir has also been touted as a sustainable alternative to peat moss in growing media. Another peat moss alternative is manufactured in California from sustainably harvested redwood fiber. Semi-open cell polyurethane materials available in flaked and sheet stock are also finding application as sphagnum replacements with typical usage in green wall and roof garden substrates. Europe has a long history of the exploitation of peatlands. The Netherlands, for example, once had large areas of peatland, both fen and bog. Between 100 AD and the present, they were drained and converted to agricultural land. The
Moss Jernverk Schweigaard wrote in 1840, "The mining industry has been a school for mechanical and technical knowledge and insight." Not much is left from Moss Jernverk: most of the buildings were demolished. Among what is preserved are the administration building (the convention building) and the workers' buildings along the street north of the administration building. The mill by the waterfalls has also been preserved. Moss Jernverk Moss Jernverk (Moss Ironworks) was an ironwork in Moss, Norway. Established in 1704, it was for many years the largest workplace in the city, and melted ore, chiefly from Arendalsfeltet (a geologic province in Norway).