BRUSSELS, BELGIUM - SEPTEMBER 20: Young protesters hold up banners and chant during the third edition of the 'Global Strike For Future' Belgium march to raise awareness for climate change on Friday 20 September 2019 in Brussels, Belgium. Millions of people join protests around the world today to mark the start of a week of global climate strikes, with activists calling on their Governments to urgently address the climate crisis. (Photo by Thierry Monasse/Getty Images)
Children worldwide unite in global climate strike
01:14 - Source: CNN
CNN  — 

When President Donald Trump visits the UN on Monday, many of his fellow world leaders will be participating in a summit meant to address climate change. Trump won’t be there.