December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.

December 2, 2018 - Brussels, Belgium : Demonstrators hold signs as they march in the main Brussels quarter during a 'Claim the Climate' march in Brussels, Sunday, Dec. 2, 2018. Demonstration takes place ahead of United Nations Climate Change Conference (COP24), in Katowice, Poland, from 03 December to 14 December.