The state government has announced the next stage in its hydrogen production strategy has been reached, with three Northern councils receiving briefs on the plan.
But Energy Minister Guy Barnett remained coy about the details, sparking calls for their release.
While claiming other states relied on coal-fired energy, Mr Barnett said Tasmania had the "unique" opportunity to use hydro and wind energy to produce emissions-free hydrogen.
Queensland, Western Australia, South Australia have released their strategies in the past year - all pushing for renewable sources. Queensland delivered its first "green" hydrogen to Japan in March.
Mr Barnett said the state had received "significant" interest in its plan, with an international group recently visiting.
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"Globally Australia's hydrogen export market is estimated to rise to between $2.6 billion and $13.4 billion by 2040 and Tasmania is expected to be a major player," Mr Barnett said.
The councils of Launceston, West Tamar and George Town have now been briefed on the plan.
Tamanian Labor energy spokesperson David O'Byrne noted a number of other states had already released their plans publicly.
"If Guy Barnett ... suddenly has a detailed Hydrogen Strategy - then let's see it," he said.
The Northern Tasmanian Development Corporation in March warned a hydrogen export industry needed to be established "quickly" in the region to avoid the state falling behind.
Located within the George Town municipality, the deep port and access to high voltage power at Bell Bay has been touted as a favourable location for a production facility.
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