She was studying economics for her HSC and a teacher asked the class to consider the financial cost of climate change.

"The cost will be more than every single war, we were told. I knew even then that this was huge," she said.

From when she was a teenager, Mrs Hook made climate change her fight, despite the message being slow to gain traction.

"Here we are 28 years later and people are still questioning whether it's real," she said.

Mrs Hook was born in Wagga Wagga, completed her schooling in Sydney and moved out to Orange with her young family almost 15 years ago.

She is the founder of climate-change awareness community group Futuring Orange and has her own business taxi-ing people around in her electric car.

The rideshare service most often ferries customers between Orange and Sydney, although her and her drivers have done trips around the region during festivals, with trips as far as Dubbo, Wagga and Scone.

She said mostly her customers are business people working in the city, people catching international flights or young people whose parents prefer them not to be on public transport.

"The idea is to try to influence people to consider electric cars as their own mode of transport," she said.

Craig Reucassal from The Chaser got a lift into town to guest speak at the sustainability expo.

Mr Reucassal is the creator of documentary series, The War on Waste, which explores the impact waste has had on the planet.

"I don't usually talk to clients the whole way up and back, but this was seven hours of bouncing ideas back and forth," she said.

"He was just very real and genuine."

Mrs Hook said since moving to the region, Futuring Orange has been the one thing she's thrown her energy into, as she sees time running out for us to act to prevent environmental damage we can't reverse.

"People don't realise the moment we are at in history. There's been so much deliberate misinformation, it's no wonder people are confused," she said.

"We really are at a point where there are two different futures; one is an unlivable world, the other is the prospect of a future we all want."