This is the 6672nd most frequent German word.
erneuerbare
Renewable.
The word 'erneuerbare' is used as an adjective describing 'Energien', signifying that the energies mentioned can be renewed and are sustainable.
Erneuerbare Energien sind wichtig für eine nachhaltige Zukunft.
Renewable energies are important for a sustainable future.
Here, 'erneuerbaren' is the declined form of the adjective used to describe 'Ressourcen', agreeing in case and number.
Die Nutzung von erneuerbaren Ressourcen reduziert die Umweltauswirkungen.
The use of renewable resources reduces environmental impacts.
In this sentence, 'erneuerbare' modifies 'Technologien', again functioning as an adjective indicating the renewable nature of the technologies.