Sarah Ott spent years as a climate change sceptic - now she's an advocate for clean energy.

I spent years doubting the science of climate change and spending time with people who didn’t believe in the science either.

When I realised I was wrong, I felt really embarrassed.

To move away from those people meant leaving behind an entire community at a time when I didn’t have many friends.

I went through a really difficult time. But the truth matters.

I’m the granddaughter of coal miners in Pennsylvania and my family moved to Florida when I was young.

We have a Polish Catholic background and we attended church regularly, but at the same time we were very connected to science because my mum was a nurse and my dad sold microscopes and other scientific equipment.