2 February is World Wetlands Day, commemorating the 1971 Wetlands Convention (also known as the Ramsar Convention). This year is the first time it is also held under the auspices of the United Nations.

In the Tivoli, Rožnik and Šiška Hill Landscape Park there are several areas that can be classified as wetlands: Little Rožnik or the Rakovnik Marsh Nature Reserve and the Mostec Nature Reserve, the Koseze Pond and the Tivoli Pond, the Glinščica Stream and the Pržanec Stream and many smaller streams.

Wetlands perform many essential functions: they are natural water reservoirs, they purify water, prevent floods, have a beneficial effect on the surrounding microclimate and alleviate climate extremes. Wetlands, especially bogs, act as sponges during heavy rainfall, absorbing and storing excess rainfall, reducing the impact of floods, and releasing water during the dry season, thus cooling the surroundings.

Wetlands act as a carbon dioxide sink, as they absorb the greenhouse gas carbon dioxide from the atmosphere for microorganisms and green plants to thrive, and oxygen is released into the atmosphere through the process of photosynthesis. Wetlands are a source of natural goods and provide a home to numerous species, many of which are also rare and endangered. Wetlands are popular areas for recreation and relaxation, and their aesthetic and educational function is also important.