Ralf Zander is one of the two managing directors of IEM Fördertechnik. IEM is building a complex cleaning system at the Schkopau Power Plant, which will use activated carbon to purify the exhaust gases from mercury. In conversation, he explains why he doesn’t think much of withdrawing from brown coal (lignite) and also what has led him to document the work in Schkopau in the form of a blog – named the Mercury-free Blog (Quecksilberfrei-Blog).