To coordinate and amplify their voices, over a hundred organizations recently banded together to create the "COP15 Collective" ahead of the December 7-19 conference in Montreal.
"It's no longer just a question of environmentalists. Everyone is around the table, everyone wants to do something and it's super encouraging," the group's spokeswoman Anne-Celine Guyon told AFP, calling it a "historic" moment for Canada's Quebec province.
And they've vowed to be heard: inside the convention center where delegates are meeting, participating in the negotiation process, and marching in the streets.
Meetings that are open to all, humorous and artistic workshops, an immersive wall projection on the impacts of oil drilling on whales -- some sixty events are planned around the conference in Montreal.
The top event will arguably be a "great march for the living" planned in the city's downtown on December 10. Organizers expect thousands of participants, but acknowledge that it's far fewer than the half a million who came out to march with climate activist Greta Thunberg in September 2019.
Despite the fact that no government leaders are planning to attend except Canadian Prime Minister Justin Trudeau, all are hoping the COP15 summit achieves "a political momentum similar to the Paris agreement" with the adoption of an "ambitious global framework," says Eddy Perez, another spokesperson for the collective.
A recent Greenpeace poll showed that, in Canada, eight out of ten people believe the government should lead by example by making strong commitments to protect nature.
"People are getting the message that this is important, that we are going through a crisis, that there are thousands of species that are in danger on our planet," believes Marie-Josee Beliveau of Greenpeace's Canadian branch.
Full of hope for this "crucial meeting," she said negotiators should know "a very mobilized civil society" is closely following the talks.
There is "a lot of interest, all of a sudden, for the issues of protecting biodiversity, probably as we have never felt," suggests Anne-Sophie Dore, an environmental lawyer and lecturer.
She adds that real educational work remains to be done, as "most people didn't even know that biodiversity COPs existed compared to climate COPs."
Canada's Indigenous population, as elsewhere, has claimed for a long time that more attention should be given to the living environment. According to UN climate experts, their traditional lands are home to 80 percent of the remaining biodiversity on Earth.
"During time immemorial, the caribou saved us," explains Jerome Bacon St-Onge, member of the Innu people in Canada's far north, evoking a "sacred species" for the Indigenous way of life, precious for its meat and its fur in particular.
"The fact that it is wasting away, it causes us very, very heavy damage in terms of cultural identity," he said, warning that "time is running out" to act.