A petition calling on the Belgian government to strengthen its climate policy has already been signed by 100,000 people.
Meanwhile, thousands of Belgian students will again be skipping class for the sixth week in a row.
They're also demanding a better climate policy.
Kevin Ozebek has more from Brussels:

Saudi Arabia intercepts and destroys drone in Mecca region
Six feared dead in helicopter crash in Indian Himalayan state, media report
Russia, Ukraine say aid is entering Oleshky, residents can leave if they wish
Four killed as Italian helicopter in EU mission in Bosnia crashes
