Ever since the company’s founder, Ole Kirk Christiansen, bought Denmark’s first plastic-injection molding machine in 1946, Lego pieces have been derived from oil, a fossil fuel.

It’s a thermoplastic with a low melting point that can be easily injected in the Lego company’s molding machines to produce bricks with extraordinary precision, durability, and hardness.

LEGO's revenue increased by 13%, ... after the company got its first plastic injection-molding machine. LEGO was founded in 1932 in Denmark by Ole Kirk Kristiansen. ...