From the article:

While about 70% of Australians choose to be cremated, it has a substantial environmental impact: the emissions from a typical cremation are estimated to be equivalent to 125kg of carbon dioxide.

In recent years options such as alkaline hydrolysis (a cremation-like process that uses water instead of fire), natural burials without embalming, and even shallow burials have become available. A natural burial uses a cardboard coffin with rope handles and will emit less than 10kg of carbon dioxide equivalent