Swedish climate activist Greta Thunberg stayed away from any direct criticism of Alberta's oil sands as she took her message to the oil-rich Canadian province.

The 16-year-old told thousands of people in front of the provincial legislature in Edmonton on Friday that the future of the planet is at stake. Alberta has the world's third largest oil reserves in the world.

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Climate change activists for a march and rally with Swedish climate activist Greta Thunberg, center, at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Swedish climate activist Greta Thunberg stayed away from any direct criticism of Alberta's oil sands as she took her message to the oil-rich Canadian province.

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Thunberg began holding solitary demonstrations outside Sweden's parliament in August 2018, skipping classes once a week to protest climate change.

Climate change activists gather for a march and rally at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather for a march and rally at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists for a march and rally with Swedish climate activist Greta Thunberg, center, at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists for a march and rally with Swedish climate activist Greta Thunberg, center, at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather in Edmonton for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather in Edmonton for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

A group of oil and gas industry supporters held a counter-rally. They took part in a truck convoy but were vastly outnumbered by climate activists.

Climate change activists for a march and rally with Swedish climate activist Greta Thunberg, center, at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists for a march and rally with Swedish climate activist Greta Thunberg, center, at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Thunberg began holding solitary demonstrations outside Sweden's parliament in August 2018, skipping classes once a week to protest climate change.

Her "Fridays for Future" demonstrations have inspired millions across the world to stage protests urging leaders to tackle global warming.

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather for a march and rally at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather for a march and rally at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists for a march and rally with Swedish climate activist Greta Thunberg, center, at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists for a march and rally with Swedish climate activist Greta Thunberg, center, at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists and a few counter-protesters supporting the oil and gas industry gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather in Edmonton for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather in Edmonton for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)

Climate change activists gather for a march and rally with Swedish climate activist Greta Thunberg at the Alberta Legislature Building in Edmonton, Alberta, on Friday, Oct. 18, 2019. (Dave ChidleyThe Canadian Press via AP)