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:

Trump says US could restart Iran strikes 'if they misbehave'
Israeli military urge southern Lebanon residents to evacuate
Russia's Primorsk port hit as Ukraine launches wave of drone strikes
Israel court extends detention of Gaza flotilla activists
