Questioning by the Australian Greens in Senate Estimates has exposed the urgent need to clean up the Shen Neng shipwreck in the Great Barrier Reef.

"Five years after the Shen Neng coal ship ran into Douglas Shoal in the Great Barrier Reef, the wreck is still poisoning the Reef with toxic anti-foulant," Senator Larissa Waters, Australian Greens Deputy Leader, said.

"But the Australian and Queensland governments have failed to provide funding for the Great Barrier Reef Marine Park Authority to clean it up.

"Climate change is the biggest threat the Great Barrier Reef faces and exporting hundreds of mega tonnes of coal through the Reef itself will make it much worse.

"We simply should not be building one of the world's largest coal ports in the Great Barrier Reef in an age of climate change, especially when we have renewable alternatives.

"Renewable energy has the potential to create far more jobs for Queenslanders and the big parties should stop browning down the Renewable Energy Target.

Australian Greens Deputy Leader, Senator Larissa Waters, comments on the International Monetary Fund's estimate of global fossil fuel subsidies:

"It's staggering that governments around the world are propping up the dying fossil fuel industry to the tune of $5.3 trillion each year.

"This equates to $10 million a minute every day of ordinary taxpayers' money being funnelled into worsening climate change.

"Governments could be investing that money into reducing poverty, instead of propping up big mining companies and holding up the transition to renewable energy.

This budget ignores climate change and almost completely ignores the environment, bar some minor and inadequate funding for the Great Barrier Reef announced weeks ago and cut from other environment programs.

"The budget does nothing to tackle global warming, biodiversity loss and habitat destruction or to protect our forests, oceans and World Heritage.

"Despite the challenges our environment faces, the Liberal Abbott Government's budget fails restore the 26 per cent of the Department of Environment's workforce that was cut in the last budget.