Just 7 per cent of voters want money from the federal government's northern Australia investment used to prop up Adani's giant coalmine, while nine times that number say they would prefer taxpayer cash going towards renewable energy or education infrastructure.

A new poll ReachTEL poll has found just 6.8 per cent of people support the idea of using public money to support coal mine projects such as the Indian mining conglomerate's controversial Carmichael proposal, which would be Australia's biggest coalmine.

Adani has parted ways with construction contractor Downer. Credit:AAP

Adani is seeking a $1 billion concessional loan from the Turnbull government's Northern Australia Infrastructure Facility to build a railway for the mine. The application will be assessed by the fund's independent board but the government supports the plan.

But the new poll of nearly 3000 people – commissioned by the Australian Conservation Foundation – suggests the public wants NAIF investments made elsewhere. Even among Coalition voters there was only 10.5 per cent support for public money going into coalmine infrastructure.