Indonesia’s resort island of Bali is set to impose a $10 levy on foreign tourists to preserve its environment and culture, The Jakarta Post reported, citing Governor Wayan Koster.

The provincial government is deliberating whether the tax, which won’t be imposed on Indonesian citizens, will be collected as part of the airline ticket or at counters at the airport, Koster told the newspaper.

Tourism is forecast to earn Indonesia $20 billion this year, more than double the amount in 2012, according to estimates from the Ministry of Tourism. More than a third of visitors to Indonesia go to Bali, known for its beaches, Hindu culture and nightlife.