Soestdijk is part of the Netherlands Nature Network (NNN). Nature must not be harmed in this network. Because it has been very quiet in the woods around the palace for a long time, all kinds of special species live here, such as the grass snake, the long-eared owl and the badger. According to the objectors, there is nothing good about protective measures that have been drawn up for flora and fauna. The calculation of nitrogen emissions and environmental nuisance due to habitation is also incorrect, say Natuurmonumenten, the Utrecht Nature and Environment Federation and Het Utrechts Landschap.