Indicators

The indicators in the Environmental Data Compendium are updated regularly. Below is the list of the last updated indicators. Using this page, you can easily see which indicators were updated since your last visit.

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Ozone layer, 1980-2024

The thickness of the ozone layer has decreased several percent worldwide in the period 1980-1995. Since the mid 1990s, it has remained stable at this lower level.

Realisation of the national ecological network – land acquisition and conversion, 1990–2024

On 1 January 2024 the area of land acquired for realising the national ecological network had increased to almost 124,000 hectares. Following acquisition, this land is converted to new nature…

Protected areas in the Netherlands, 2024

Terrestrial protected areas cover 20% of the land surface of the Netherlands. Almost all of this area lies within the national ecological network. Almost half (9%) consists of statutory protected…

Wind turbine visibility and impact on visual amenity, 2022

Onshore wind turbines in the Netherlands are visible in about a third of the country and affect the visual amenity of the landscape. The number of wind turbines and the area of the country in which…

Agri-environmental management, 1981–2024

Since 1981 the Dutch government has provided subsidies for agri-environmental management to conserve nature and landscape values in agricultural areas. On 1 January 2024 the area of farmland under…

Farmland bird indicator, 1915-2024

Changes in agricultural practices have caused a significant decline in breeding birds typical of agricultural areas in the Netherlands, starting from the early 20 th century.

Red List Indicator, 1995 - 2024

Since 1995 the number of endangered species increased slightly. However, a noticeable reduction in levels of threat was identified.

Nature types in the Netherlands, 2023

Nature in the Netherlands can be divided into different ‘types’ of natural and semi-natural areas. Since 2008 the standard classification for this has been the Nature and Landscape Index (Index NL)…

Alien species in the Netherlands, 1990-2020

The number of new species becoming established in the Netherlands as a result of human agency is growing rapidly. Most of these alien species are terrestrial arthropods (insects) and plants. In recent…

Spatial conditions of the national ecological network, 2021

The increase in the area of new nature since 1990 has improved the size and connectivity (spatial conditions) of terrestrial ecosystems in the Netherlands. However, a considerable part of the national…