The Greens have issued an ultimatum to the state and federal governments after the latest report expressed "serious concern" regarding the Great Barrier Reef rescue plan.

UNESCO, which advises the World Heritage Committee, said on Saturday that key targets in the Reef 2050 plan "are not expected to be achieved" and urged Australia "to accelerate efforts".

"Our governments must choose between new coal or the reef," Greens Queensland Senator Larissa Waters said. Credit:Simon Uren

In response to the fresh concerns, Queensland Greens Senator Larissa Waters launched a scathing attack on the state and federal governments.

"Meanwhile, Queensland Labor and Turnbull roll out the red carpet and public money for Adani for their deadly mega-coal mine," Senator Waters said.



"As many scientists have said, our governments must choose between new coal or the reef.



"Will the two old parties back the 70,000 people with reef jobs? Or will they pay back the millions in donations from the mining industry, sign the reef's death warrant and continue to back Adani?"