Besides plastics the sneakers industry uses crude oil repeatedly. As we all know, oil is not a sustainable resource.
There are shoe brands that are trying to develop alternatives to the use of the oil. Take Nike for example. They’ve created a shoe called the Flyknit. With the Flyknit constructed with one knit upper that is stuck to the sole of the shoe. This makes the shoe lightweight, breathable and reduces waste. Nike also has project called Reuse-A-Shoe. Old running shoes get recycled to Nike Grind and make great athletic turfs and playground surfaces.