Climate Tasmania member David Hamilton said the group wants the state government to make meaningful changes to the Climate Act the next time it's reviewed.

"Climate Tasmania's challenging the Tasmanian Parliament to come up with an ambitious, comprehensive and detailed Climate Change Act that brings together all parties," Mr Hamilton said.

"It's a foundation that the state can work on for many years to address the climate challenge.

"There is an existing Climate Change Act which basically does nothing."

Mr Hamilton said Tasmania's emissions have gone up slightly in the past two years, with no sign of going down.

"We're [Tasmania] not addressing the challenge at all, we need to do a lot more," he said.

"We [Climate Tasmania] think the new action is to be ambitious, which means trying to move as quickly as the science tells us we need to move."

Mr Hamilton said Climate Tasmania has been in discussions with the state government and recently submitted its proposed amendments.

Mr Hamilton cited a 2018 report that predicted the major climate repercussions of a two-degree global temperature increase.

"In two degrees, we can pretty well kiss the Great Barrier Reef goodbye. At one and a half [degrees] it's got some chance," he said.

"To stable by one and a half degrees we need to halve our fossil fuel emissions in about the next 10 or 12 years. Which is a big target."

"Our leaders need to listen to the science, and we need to what the science is telling us we need to do in order to get our way through this."

TIME TO DECIDE:

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