TeamTrees.org

TeamTrees.org (or #TeamTrees) is a widespread fundraiser created by Mark Rober and MrBeast. The fundraiser is used to attempt planting 20 million trees before January 1, 2020, to help save the environment after multiple Forest Fires, and the Amazon Rainforest fire that took place in 2019.

The Beginning
It all started with a tweet by MrBeast on October 13, stating that there will be a really huge collaboration on October 25. When MrBeast released his video attempting to plant 20 million trees, he was only able to plant 1,000 in the video, and then asked his fans to donate so the goal can later be reached.

The Donators
Elon Musk donated 1 million USD to plant 1 million trees, and has also changed his Twitter name to 'Treelon' and a picture of trees in the background.

Susan Wojcicki, CEO of YouTube, donated 200,000 USD to plant 200,000 trees, and has also made her own fundraiser video with Mark Rober to help out.

Top 24 donations
Note: This list comes from the TeamTrees.org website. Updated as of October 31, 2019.