Research shows that washable nappies can reduce your carbon impact by 40% compared to disposables.

A child uses an estimated average of 4000+ nappies in a lifetime. Each disposable nappy uses about a cup of crude oil in manufacturing, and uses 37 litres of water.

You can read more here:

https://friendsoftheearth.uk/faqs/are-washable-nappies-better-environment

https://www.thenappylady.co.uk/news/cloth-vs-disposable-nappies.html

https://www.babaandboo.com/blogs/news/reusable-versus-disposable-nappies-the-real-story-of-their-environmental-impact