Billionaire entrepreneur Elon Musk took to Twitter to announce he is donating $1 million to plant 1 million trees to the 'TeamTrees' project. The billionaire also changed his name on Twitter to Treelon. TeamTrees, led by 21-year-old YouTuber Jimmy Donaldson, aims to plant 20 million trees and raise $20 million by the end of 2019 for the Arbor Day Foundation.