There have been protests around the world against the detention of a group of Greenpeace activists by Russia after they protested against drilling in the Arctic.
In France, Oscar-winning actress Marion Cotillard joined Greenpeace activists in a cage near Paris’s Louvre museum.
She held a banner which read “I am a climate defender” and praised the bravery of those who “have the courage to defend the planet.”
Politicians and other celebrities from the world of arts also came to show their support.
In the UK, former Beatle Sir Paul Mc Cartney has written a personal letter to President Putin.
Protests are planned at over 70 Shell petrol stations around the UK on Saturday.
The 30 are currently being held in prisons in Saint Petersburg. Russian authorities have applied for an extension to detain the group for another three months.