The Roots are one of the best reasons to watch Late Night with Jimmy Fallon. Two weeks ago, we saw The Roots play the walk music for Bill Cosby which turned into an entertaining affair all in itself (Watch Here). Now we have footage of the band honoring Earth Day with an impromptu freestyle session. Host Jimmy Fallon chose two members of the audience for a little chat while Black Thought offers a lyrical summary of the conversation with Questlove and company delivering the instrumental background. Make sure you also check out the video of Black Thought on the Combat Jack show here.