than 75% corals survive on the structures whereas natural reefs lost up to 40% of coral cover. Now the Gili Eco Trust leads many various projects to ensure Gili islands' sustainable development and promote eco-tourism. Projects The Gili Eco Trust has implemented projects to protect and regenerate corals, and to preserve land environment on the Gili islands. Coral Protection The Gili Eco Trust cooperates with the SATGAS (and more recently the marine authorities of North Lombok BKKPN) to protect coral reefs. 20 days per month and on call, members of the SATGAS patrol to be sure that no one destructs coral and that fishermen respect the agreement on fishing areas and lawful fishing practices. The Gili Eco Trust is installing mooring buoys to avoid anchoring on coral reefs. Mooring buoys also help to mark the boundaries of fishing areas. To gain further students and undergrads to learn more about coral and how to protect it, the Gili Eco Trust has developed a partnership with Mataram University, Lombok. Students in PhD, specialized in marine biology, come to Gili Trawangan to do studies on coral and to learn about Biorock technology. "Coral Watch" dives are also available in every dive shop. Data collected during the dive help Project Aware scientists in their studies on coral reefs. Coral Restoration Coral is facing so many factors of degradation that the Gili Eco Trust decided not only to protect coral reefs but to restore them too. A Biorock Coral Reef Restoration Program has been implemented since 2006. Biorock method consists in installing new artificial coral reefs on the ocean floor. These reefs can have two positive roles: being ideal habitats for corals, fish, shellfish, mollusks, seaweed, etc. and being efficient wave breakers which protect beaches from erosion. Now the Gili Eco Trust wants to develop a Biorock structure which would be provided with electricity by a turbine thanks to sea current. Thus, Biorock method would be more sustainable. Today, 63 Biorock structures regenerate the Gili islands' coral reefs. In the same time, the Gili Eco Trust organizes Biorock workshops every two years to teach people from all around the world about Biorock so that they can replicate it in other damaged coral areas. In 2006 the workshop received 31 participants, 52 in 2008 and 80 in 2010. These workshops are supported by PADI, Project Aware, the Global Coral Reef Alliance, Mataram University, the Lombok government