“In 2002, 100,000 Australians stood up for Ningaloo Reef. Fifteen thousand marched in Fremantle to save it. Those earlier defenders of Ningaloo haven’t gone away.” See Tim Winton’s essay in the December-January issue of The Monthly.
https://www.themonthly.com.au/issue/2018/december/1543582800/tim-winton/saving-ningaloo-again