A climate change conference took place in Paris this year. Leaders from all around the world hope to come to an agreement on climate.
A march for climate change was going to take place, but the government forbid it because of the Paris attacks. Organisers wanted to make it up to the people who wanted to take part in the march.
They let people leave their shoes in a Parisian square. Each pair represented a person. Many celebrities, including the Pope, put their shoes in the square.