Grey heron infected with West Nile virus A grey heron in the Noord-Holland-Noord region has tested positive for the West Nile virus. The virus is rare in the Netherlands. Bas van de Meulengraaf
Need for circular use of materials in construction Construction and demolition waste are being recycled on a large scale to use as a foundation for e.g. roads, but recycled building materials are hardly ever used in the construction of buildings.