The GBR is 40-80 km offshore of the Queensland coast. And still the authorities of the Great Barrier Reef Marine Park Authority (GBRMPA) nevertheless consider protection of the GBR from increasing nutrient levels to be the greatest challenge facing the GBRMPA in the decades to come;
p.433; in ....
Kelleher G.K.; 1990; The reef and conservation strategies; Reflections No. 25: 4-5;