I’m sorry this is so late orz;;;; Slowly working through the palette meme requests. I forgot which palette but I ended up using the one that’s been circulating around more.
The plastic byproduct of Gunpla production is sold off and used to produce MEGA BLOKS as well as various other LEGO knockoffs. Bandai is also planning a (currently Japan-only) return service for used runners so that they can be melted down and reused instead of thrown away. This is Bandai’s attempt to be more environmentally friendly.