Protests against Donald Trump are planned in 500 cities around the world tomorrow to coincide with Earth Day.
Marchers fear the US President's policies are damaging and undermining science, and its use in the public interest.
They will be taking to the streets in Auckland, Wellington, Christchurch and Palmerston North.
Association of Scientists president, Dr Craig Stevens, told Mike Hosking protesters are against President Trump's fundamental position against climate change.
"This march is an opportunity to show where the public of the world stand on science."
However, Dr Stevens said the marches aren't totally about opposing President Trump.
"It's also a celebration of science in New Zealand and showing that there's a critical mass amongst the public of people who really value science."
LISTEN ABOVE AS DR CRAIG STEVENS SPEAKS WITH MIKE HOSKING