sentences:  Later, in the 1950s, Hydro would take up these plans and build a magnesium factory, which was rebuilt in 2002 to a metal recycling facility.In the reminiscing book "UT.Fra en oppvekst i forrige århundre" by historian Harald Berntsen, portrayals are given of incidents and milieus in Herøya, from the time when his family moved there in 1951 (from downtown Porsgrunn), just before he was to begin school, and until 1960.