slt aidez moi dans ce petit exercice d'anglais et merci d'avance ​

Réponse :

Earth Hour is the world's biggest environmental event. It'll take place in 170 countries across the continents on March 25th, 2017 from 8:30 PM to 9:30 PM. Millions of people will participate and switch off the lights. Finally, its purpose is to help reduce the impact of climate change and show care about the future of the planet.

Explications :