State and Federal South Australian Greens are calling on the community to stand together with traditional owners who are fighting against having a nuclear waste dump on culturally significant land near the Flinders Ranges.

The Greens acknowledge that Australia must take responsibility for managing our own nuclear waste, however the Government has not made the case for dumping it in outback South Australia. The Greens have called for Lucas Heights waste to continue to be stored on site and for hospital waste to be properly audited and only moved if found to be unsafely stored.

The Australian Greens are calling for BP to release publicly all environmental plans and oil spill modelling submitted to NOPSEMA for community review.

"If BP is confident it can contain an oil spill and mitigate against harm to our tourism and fishing industries, and the precious Great Australian Bight environment, then there is no reason why this information shouldn't be made publicly available," Greens Senator for South Australia Robert Simms said.

The Environment and Communications Reference Committee will be holding a hearing in Adelaide TOMORROW as part of its inquiry, established by Greens Senator for South Australia Robert Simms, into oil or gas production in the Great Australian Bight.

Greens sexuality spokesperson Senator Robert Simms, a former Adelaide City Councillor, has welcomed the council's decision to progress with building a rainbow walk in Light Square in the Adelaide CBD.

"It has been a long time coming since the council agreed to my proposal of installing a rainbow walk, and it is great to hear the news that construction will start in September," Senator Simms said.

"This walk will become a symbol of diversity for Adelaide and will make such a positive statement for LGBTI South Australians."

Australian Greens higher education spokesperson Senator Robert Simms has urged the government to drop its plan to deregulate university fees, which would burden students with massive debts when they graduate.

"The Greens are proposing a reduction in student debt by lowering HELP fees by 20 per cent, which would be paid for by maintaining the deficit levy. There is a fairer alternative that delivers top-class university education to young Australians, paid for by the people who can best afford it," Senator Robert Simms said.

Greens higher education spokesperson Senator Robert Simms has revealed the Greens plan to reduce HELP debts by 20 per cent and re-instate student start-up scholarships.

"We're constantly hearing the argument from the government that students need to carry the burden for their chronic under-funding of the university sector, but this is simply untrue and unfair. Students shouldn't be seen as cash cows. Investment in higher education is in the public good," Senator Simms said.

The Australian Greens are urging state governments to stay strong on maintaining environmental water recovery targets ahead of a meeting of State and Commonwealth Water Ministers in Brisbane tomorrow.

The Greens are calling on the Government to dump its deregulation agenda after new PBO costings released today exposed the reform's $1.2 billion price-tag.

"The Greens have been arguing for years that deregulation is a false economy. Today, we have further evidence that this is the case. Indeed by 2025-26 it will cost taxpayers $1.2 billion," Greens higher education spokesperson Senator Robert Simms said.

Australian Greens sexuality spokesperson Senator Robert Simms says Prime Minister Malcolm Turnbull should direct Treasurer Scott Morrison not to attend the upcoming Australian Christian Lobby national conference.

Treasurer Scott Morrison is scheduled to appear as a speaker at the conference on Saturday, April 23, in Sydney, alongside commentators who are known for their anti-LGBTI views.

Greens Senator Robert Simms has told the Victorian Local Government Association's Rainbow Working Group that local government should make the most of its potential to positively change lives and has an important role to play in promoting LGBTI rights.