A student-led strike calling for greater action on climate change held in Hobart on Friday was 'bigger than the Franklin dam protest', said former Australian Greens leader Bob Brown.
Organisers estimate 22,000 people turned out for the event.
As part of the worldwide event, led by 16-year-old Swedish climate activist Greta Thunberg, tens of thousands of Australians attended strikes across the country with millions expected to strike globally.
Addressing the crowd, former Tasmania Fire Service chief officer Mike Brown said there did not seem to be any meaningful policies on combating climate change from those in power.
"While Tasmania enjoy a temperate climate, we need to remember that our state located in one of the most bushfire-prone locations in the world," Mr Brown said.
"The truly catastrophic fires were once in a generation, know they are an annual event."