Since I had my first cat about 5 yrs ago(RIP) I have been through many different types of cat litters... experimented with them to ee the difference including environmental effect but most importantly effect on the cats health...
I have found using the cheap dusty ones one is no option for either the cat or environment
using the wood based I found out they treat the wood to protect it but what effect does it have on the poor cat god knows....
Since I discovered Bio-Catolet I have hardly looked at anything as it is paper based it is good for both environment and the cat.
As their website says
100% recycled paper
No landfill or disturbing Mother Earth
Light to carry
Lasts long than other cat litters
12lt =7/10days 25lt = 20/24days
Built in winter and summer perfumes
Contains a flea deterrent (veg based)
A brand pet owners trust
Absorbs 250% of its own weight
Suitable for other small animals
Value for money
60% lighter than clay
30% lighter than wood
Sold in the UK for over 15 years
I have created a list of the product being sold by different retailers. As you will find the list in the link for your convenience I have created my own Links and prices in the first comment.