For this activity, I proposed to my students to make a poster with our tips about how to be careful people with our planet. Because this  was an online activity, we used https://www.canva.com/ . We formulated 5 tips which we were happy  to share with our collegues from our school, city, even country. All these tips were easy things that everybody can do, like: use natural materials to make a school project, take care of small plants, adopt a tree, recylce, dont't waste the drinkable water. We posted our poster on the school platform.