On the 31st of March 2012, various ARTEH® Hotels in Portugal and Brazil will join the initiative Global Earth Hour from WWF to raise the world's population awareness for the necessity to fight against global warming, promoting thematic parties and dinners at the Hotels.

Participant ARTEH® Hotels

Brazil
- Tivoli Ecoresort Praia do Forte, Forte Beach, Bahia.

Portugal
- Bairro Alto Hotel, Lisbon.
- Onyria Marinha Edition Hotel & Thalasso, Cascais.
- Tivoli Jardim, Lisbon.
- Tivoli Palácio de Seteais, Sintra.
- Tivoli Victoria, Vilamoura.