Reusable nappies. So so disappointed, I got a Bambipur bundle of 5 for 30-something £ (big reduction from £100!) and one single one to avoid paying shipping, think it was £46 in total. Very excited when they arrived and then despite having read the washing instructions before purchasing, DH pointed out that washing them separately, at 60 degrees, long wash, extra rinse cycle, non bio detergent without coconut oil, all uses far more water and energy than our normal eco low temp eco detergent bulk washes. We even considered handwashing them!
I'm returning them unused but still have some new condition ones ordered from Vinted that I'll try to use occasionally. Researched and apparently reusables only reduce the carbon emissions of nappies by 25%! And depends on the needs of your area - reusables are worse for water use and pollution because of detergents, and reservoir droughts are in the news currently.
Looked at biodegradable nappies, bags and wipes - apparently they are only biodegradable if they're composted, and on a landfill they're equivalent to the normal disposables!
I am going to try using Bambino Mio cloths (think one side is terry cloth and one bamboo) with a tail bath for wet nappies at home and see how I go from there. Apparently you can wash them at 40 degrees, and they're a lot more efficient than normal wipes. I'd like to get to use them out and about where possible as well, bringing a bit of baby wash with me, as most baby changes have a sink.
I've also joined some local climate action groups and written to my MP about climate related issues - just trying to figure out what changes I can make. But the nappies are a real disappointment.