A programme of events taking place throughout the month will be dedicated to raising awareness about the topic.
An information point in front of the Town Hall will kick the month off by presenting the Ljubljansko barje park and the story of its prehistoric pile dwellings.
Wednesday is planned to be an eventful day, as visitors of the capital will be able to taste local Ljubljana cuisine and take part in a free guided tour of Tivoli Park, which will take place again on Sunday and on 25 August.
On the same day, the Ljubljana Botanical Gardens will present an educational trail where the endangered Fleischmann's Parsnip is said to have been found for the first time more than 200 years ago.
Similar green-themed guided tours organised by the Ljubljana Tourism Board will take place on Sunday, including one through the Beekeeping Trail.
Wednesday will also see the Ljubljana Regional Development Agency present the Gremo na pot online guide on cycling, hiking and running trails in Ljubljana. The presentation will be held again on 25 August.
The Ljubljana City Library will organise several fairy tale readings throughout the month for children.
About a month ago, Ljubljana received the international Golden Apple Award, a prize considered the "Oscar of tourism", which is conferred by the World Federation of Travel Journalists and Writers (FIJET).
Ljubljana was honoured for its preservation of cultural, natural and historical heritage and their inclusion in the tourist offering, and for introducing the principles of sustainable development into tourism.