Hundreds of French students took to the streets of Paris demanding urgent measures to combat climate change on Friday, a day after a similar march in Brussels. /VCG Photo

Young demonstrators marched holding placards with messages like "Let's change the system, not the climate" and "There is no planet B" during the protest. /VCG Photo

Greta Thunberg, a well-known 16-year-old Swedish environmental activist, also joined the Paris march on Friday. /VCG Photo

"I didn't hear any concrete promise by political leaders and officials," AFP quoted the 16-year-old as saying, who also added "they only say that they are going to try their best." /VCG Photo