The Swedish environmentalist was awarded the prize in Caen, northern France, on Sunday. Thunberg posed alongside WWII veterans Charles Norman Shay and Léon Gautier, who commemorated the 75th anniversary of D-Day last month.
“I think the least we can do to honour them is to stop destroying that same world that Charles, Leon and their friends and colleagues fought so hard to save,” said the 16-year-old Thunberg.
The environmental activist is due to speak at the French National Assembly on Tuesday but some MPs are boycotting the event.
“We don’t need apocalyptic gurus to fight climate change intelligently,