Slovenia is distinguished by an exceptionally wide variety of habitats, due to the contact of geological units and biogeographical regions, and due to human influences. The country is home to four terrestrial ecoregions: Dinaric Mountains mixed forests, Pannonian mixed forests, Alps conifer and mixed forests, and Illyrian deciduous forests. Around 12.5% of the territory is protected with 35.5% in the Natura 2000 ecological network. Despite this, because of pollution and environmental degradation, diversity has been in decline. Slovenia had a 2019 Forest Landscape Integrity Index mean score of 3.78/10, ranking it 140th globally out of 172 countries.