The 17-year-old was nominated for her commitment and volunteer work for environmental sustainability.
Katrina said her involvement with the Australian Youth Climate Coalition motivated her to take action and make a difference.
‘There have been so many historical movements that have shaped how humans live,’ she said.
‘We just need to do something to make a difference, this is how we change the future.’
There were 78 nominees across WA for the award and she was named the overall ambassador out of the 15 winners.
Both her economics teacher Carisa Crockart and Year 12 co-ordinator Lisa Somers nominated her for the award.
‘I’d really like to thank the AYCC and Rossmoyne High School for encouraging me to seize opportunities and make a difference,’Katrina said.
Katrina said she was a founder of the group Rosstainable, her first step in giving back to the community.
She said she hoped to help motivate her peers to get involved in sustainability projects and make a difference.
‘This community has given so much to me and I want to give something back,’ she said.
‘Lots of young people don’t feel they have the means to rise up and take action.
‘If everyone had that mentality where would the human race be today?’
Katrina received a certificate, trophy and camera for the award and also won 24 cameras for her school.
The Year 12 student said her dream was to become an environmental engineer.
‘I like the idea of saving the world and motivating others to do the same,’ she said.