This environmental protest was organised around the world by school kids, who are frustrated to politicians who are not doing enough to prevent climate change from happening. This movement was started by a 15-year-old schoolgirl Greta Thundberg in Sweden, who wanted people to take action to prevent climate change before it's too late. More info here in the Guardian and to support the cause by signing a petition here.
Climate march started from the Senate square in Helsinki.
Academic Ecologists support the young environmental protest marchers.
Climate march ended to the Parliamnet building in Helsinki.