Students around the world took to the streets to protest about how climate change.
SDLP leader Colum Eastwood MLA and the party’s Mayor of Derry City and Strabane District Councillor John Boyle also joined the protest at the Guildhall.
Mr Durkan said: “I commend the young people who have been mobilising to raise awareness of and inspire action against Climate Change, the biggest threat facing our planet and the biggest challenge facing mankind.
“Gone are the days when climate change was dismissed as some kind of conspiracy theory and the concern of ‘tree-huggers’ and hippies.
“The evidence of it is irrefutable and the time to fight back against it is now.
“All of us can play our part in protecting the planet; be it by reducing our waste, minimising our car usage or simply recycling properly.
“It is fitting that young people are leading the charge, they will be here after we have gone and they have a real opportunity to do something no other generation has done in history; to leave the world in a better condition than they got it in.
“We should be doing everything possible to help them achieve this but sadly some important legislative changes required to strengthen environment protection here in Northern Ireland cannot be made in the absence of an Assembly,” added the Foyle MLA.