Sophie and Raven hit back at the "patronising" attitudes of some opposed to the action.
They're expected to join counterparts around the world today in skipping classes to rally against government inaction on climate change.
Some were harsh critics of the planned protest while others support the students.
Thousands of school students around the world have been staging regular strikes in a bid to push politicians to act aggressively on climate change.
Yesterday the Thames-Coromandel Mayor said she did not want to sign the declaration because it was "politically charged".
Thames-Coromandel mayor says the push to sign up to a declaration on climate change is "politically charged and driven".
"I don't think there's a shortage of understandable information out there about climate change," climate scientist James Renwick said.
That's according to the PM, who spoke about the issue on a panel at the World Economic Forum.
The Duke of Sussex and his wife Meghan were guests of honour at the Australian Geographic Society's annual awards to highlight the environment.
A lawyer says NZ is one of only two OECD countries that haven't signed an international shipping pollution agreement.
Climate change and rising sea levels are a concern for many, none more so than on the West Coast, where the Sunday team went to investigate what is being done.
Prediction is the result of a new statistical model using weather trends dating back over 100 years.