sorry, need to address these points...
There is no point making a nappy biodegradable if it is going to end up in a landfill. They have found lettuce preserved in landfills and lettuce usually decomposes very quickly (my fridge drawer is proof of that!).
IMO reusables does reduce emissions, because of the manufacturing involved with disposables.
Leakage, yeah I've had cloth nappies leak. I've also had huggies and pampers leak. It is all about finding one that fits your baby right. I had one nanny charge who always leaked in huggies, yet my older son had splats up the back in pampers.
You don't need to bleach yellow nappies. Simply sit it on a windowsill (or dry outside if weather allows) and the yellow goes.
As for washing being work, more effort, more water etc, think about using that justification for any other reusable object we use and think of the alternative and think about how silly that sounds. Imagine a friend who only wears socks once and gets new ones, disposable paper clothes, only ever using plastic plates and cutlery and then throwing it away. If you knew someone who did that wouldn't you think it was a tad wasteful?
I'm really not trying to convince anyone but like someone upthread it feels wrong to have these things being said and no one answering them. I mainly did cloth for DS#2 out of curiosity but had no choice but to continue because he broke out really badly in disposables.