10,000 shoes left in Paris square. Here's the reason

Sunday, November 29, 2015, 10:17 AM - With the U.N. Climate Change Summit about to get started Monday, marches in support of climate change action have taken place all around the world this weekend.

But in Paris, the host city for the talks, security concerns in the wake of the terrorist attacks earlier in the month have curtailed some protests in public places, like the city's renowned Place de la Republique.

That hasn't stopped climate activists, though. They've gathered up numerous shoes -- the BBC says 'hundreds', the Guardian says 10,000 or more -- and lined them up neatly in the square, in place of marchers who would be there if they could.

Among them are shoes donated by Pope Francis, who has been a staunch advocate for climate change action.

Worldwide, marches are planned from Australia to the United States, and organizers hope the number of marchers will be in the millions. Here are some of the best shots from protests around the world.

SOURCES: BBC News | The Guardian