So, which pencil is the greenest pencil? It's not the plastic refillable kind. While they may seem green because you refill them when needed, the reality is that these pencils A) break, B) are made from non-renewable plastic, and C) the refills come in plastic tubes. Stick with the good, old-fashioned wood pencil instead. Many are now made from reclaimed wood, which would've otherwise gone into landfills.