But it only gets better: Soon after, Justin decided to keep the party going and sang "My Girl" directly to Selena Gomez.Instagram contentView on Instagram Throughout the short book, the duo detail what they learned by becoming activists. Here are six tips from the young activists themselves, David and Lauren:1. No permission necessary. “It’s really striking because historically those off-the-charts conditions have only occurred in the Sonoran desert region of the U.S., the California-Arizona border,” Dahl said. hotter than at the end of the 20th century. This warming is part of a larger trend that is heating up the planet and melting ice in Greenland and Antarctica, raising the sea level near the city.