We were part of the world heritage listing of Murujuga. Here’s why all Australians should be proud

On Friday, the Murujuga Cultural Landscape in northwest Western Australia was inscribed on the UNESCO World Heritage List. We were in Paris to see Murujuga become Australia’s 21st world heritage property, but only our second property listed exclusively for its Indigenous cultural values.

Murujuga, meaning “hip bone sticking out”, is an ancient rocky landscape rising out of the Indian Ocean in northwest Australia.

Murujuga is shaped by the Lore and the presence of Ngarda-Ngarli – the collective term for the Traditional Owner groups of the coastal Pilbara – since Ngurra Nyujunggamu, when the earth was soft, the beginning of time.

Murujuga includes the Burrup Peninsula, the Dampier Archipelago’s 42 islands and the listed property covers almost 100,000 hectares of land and sea country. Across this cultural landscape are between one to two million petroglyphs – rock art – created by carving designs into rock surfaces. The petroglyphs record Ngarda Ngarli’s attachment and adaptation to a changing environment through deep time.

The UNESCO listing recognises the “outstanding universal value” of the Murujuga Cultural Landscape. This value lies in the traditional system governing it, in tangible and intangible attributes that attest to 50,000 years of Ngarda-Ngarli using and caring for the land and seascape.

The Ngarda-Ngarli have campaigned for World Heritage Listing of the Murujuga Cultural Landscape for more than 20 years.

A controversial nomination

While the outstanding universal values of this place were not in question, the nomination became mired with broader climate concerns.

Industrial development began at Murujuga in the 1950s and was established before Traditional Owners had decision-making authority. The Dampier Archipelago, as well as housing petroglyphs across 42 islands, is also home to one of the largest industrial hubs in the southern hemisphere.

The recent approval for the North-West Gas Hub has elevated climate change concerns and raised questions about whether the government is serious about protecting Murujuga.

The Murujuga Rock Art Monitoring Program (MRAMP) year two report was released around the same time as the north west gas hub announcement.

While acidic pollution has been suggested by some, our work on the monitoring program found rain and dust at the site was pH neutral, and there is no acid rain impacting on the petroglyphs.

Other criticism included that the air quality at the site is compromised by local gas production. The research found the air quality at Murujuga is “good” to “very good” by international standards. We also found average annual nitrogen dioxide levels − the emission under most scrutiny − is five times lower than World Health Organisation guidelines.

According to MRAMP research, Murujuga’s air quality is well within national standards. Nitrogen dioxide is 16 times lower than the national standard, and sulphur dioxide never exceeding 10% of the national standard.

Importantly, the research program is ongoing and will transition to monitoring led by the Ngarda-Ngarli with support and training from the scientists. And this ongoing monitoring will be part of the management regime in place to protect Murujuga as a world heritage listed site.