Are shampoo bars and hair soap a more sustainable approach to haircare?

As shampoo manufacturers come under pressure to reduce plastic waste, solid hair care products are set to witness a boom. Photo: Christin Klose/dpa

Haircare manufacturers are notorious, along with much of the beauty industry, for their plastic waste, and every year countless shampoo containers are transported across continents only to end up on landfills after they are used up.

But a wave of sustainability is finally poised to sweep the industry. Solid haircare products are becoming an increasingly common sight in chemists and boutique shops.