The #TeamTrees movement began in October 2019 as a collaborative fundraising campaign spearheaded by YouTubers MrBeast and Mark Rober to celebrate MrBeast reaching 20 million subscribers. The goal was to raise $20 million to plant 20 million trees through the Arbor Day Foundation. The internet quickly turned the movement into a viral phenomenon, creating memes that depicted MrBeast as a hero of the Earth or contrasted environmental protection with corporate pollution. It became a hallmark of internet philanthropy, demonstrating how digital meme culture could mobilize millions of people for a tangible, positive global impact.