YouTube stars Mark Rober and Jimmy "Mr. Beast" Donaldson kicked off a global program to get 20 million trees planted by next year and they've already soared past the 5 million mark.
It all started after Mr. Beast hit 20 million subs on YouTube and his fans suggested he should plant 20 million trees to celebrate. Beat contacted Rober and the two worked on a plan to team up and bring the planting dream to reality.