For every resident of the tiny Pacific island nation of Palau, eight tourists come to visit.
The damaging environmental footprint of 160,000 visitors is something the world's 13th smallest island is trying to address.
Foreign Minister Julie Bishop, International Development Minister Concetta Fierravanti-Wells along with Labor's Penny Wong and Claire Moore are on a tour of Palau, Micronesia and Marshall Islands this week.
Ms Bishop on Monday announced a $78,700 contribution towards the "Palau pledge" - efforts to encourage tourists and local businesses to be more environmentally conscious and sustainable.
Palau president Tommy Remengesau was grateful for the support.
"The Palau pledge has already made an immediate impact on visitors and the citizens of Palau, encouraging greater awareness of the responsibility we have to our children and our children's children," he said.
Among the pledge supporters are Oscar-winning actor Leonardo DiCaprio, billionaire Richard Branson and former US secretary of state John Kerry.
Australia's May budget included a record $1.3 billion aid investment for Pacific island nations, which are considered among the most vulnerable in the world to climate change as they grapple with rising sea levels and the increased frequency and intensity of cyclones and storms.
