When I was 12 years old, I wrote a speech about climate change for a primary school speaking contest. Unfortunately, as I would soon learn, it takes a lot more than giving a speech to move governments. For the next eight years, impassioned by the same goals, I wrote petitions, signed letters, attended rallies and marches, and spoke up at climate town halls. I have used every available traditional forum to voice my concerns, and yet the politicians that are supposed to protect my future have consistently failed to take necessary action on climate change.

When an opportunity presented itself to take my demands to the next level, I took it. For the past two months I have recruited students and youth for Climate101, a civil disobedience action calling on Prime Minister Justin Trudeau to reject the Kinder Morgan pipeline. Last Monday, that action culminated in 99 young people being arrested on Parliament Hill — the largest act of youth-led climate civil disobedience in Canadian history.

Opposing Kinder Morgan is a matter of climate justice. As students, many of us with experience in fossil fuel divestment campaigns, we know that expanding the tar sands means trampling on the rights of people across Canada and around the world. Canada made commitments in Paris last year to limit global warming to 1.5 degrees, but if Kinder Morgan and other tar sands pipelines are built, we will be on track to use up almost one quarter of the world’s remaining carbon budget. Approving Kinder Morgan means standing by as small island nations are drowned, people die of famine, and increasingly prevalent and dangerous natural disasters destroy communities.

If Prime Minister Justin Trudeau approves Kinder Morgan, he will also be breaking his campaign promise to respect the rights of Indigenous peoples. Cedar Parker-George of the Tslei-Waututh First Nation, one of the youth speakers at the action on Monday, says it best: “Justin Trudeau promised to listen to Indigenous communities. Well, my community has been pretty clear; reject this pipeline and protect the water, the land and the climate.” Tslei-Waututh and other members of Indigenous communities protecting the land are protecting their right to survive, and we need to stand with them.

Young people took action on Monday because the stakes are high, and because it just might make the difference. We know that when young people come together, we are powerful. For instance, the fossil fuel divestment movement, led by students, has collectively led to $3.4 trillion in assets being divested thus far. In the United States in 2014, dozens of youth were arrested outside the White House protesting the Keystone XL pipeline. A year later, after dozens of other actions and fierce opposition from Indigenous peoples, Obama rejected the pipeline.

Climate 101, similarly, drew on the power of young voices to influence change. Last election, 45 per cent of people aged 18–25 voted Liberal and helped along the formation of a majority Liberal government. That same demographic, spanning all the way up to 35, is overwhelmingly opposed to pipelines and supports strong climate action and respect for Indigenous rights.

Those of us arrested on Parliament Monday came with a plea, but also a warning: if Trudeau wants the support of millennials next election, he needs to reject Kinder Morgan. Perhaps seeing 99 youth arrested on his doorstep will be the tipping point he needs to make that decision.

Amanda Harvey-Sanchez is a third-year student at Trinity College studying Environmental Studies, Social Cultural Anthropology, and Equity Studies. She was one of three youth organizers working on recruitment and planning for Climate 101 with 350.org.