More than 200 schoolchildren and students have gathered in Senegal's, capital, Dakar, for the climate strike.
Many of the young people taking part in the suburb of Rufisque are carrying signs which say, "Legui Legui", which in the local Wolof languages means: "Right Now".
Senegal is particularly vulnerable to climate change.
It it is already experiencing "desertification" - the persistent degradation of dry land ecosystems by human activities and climate change.
The UN predicts more than 50 million people will be forced to leave their homes by 2020 because their land has turned to desert.