There is also the water consumption. One cotton t-shirt uses more than 2000 litres of water. That's about a month's worth of daily showers. It wouldn't be too bad if the garment would last 10+ years, but they don't.
Unfortunately the people (mostly women) who drive this are addicted to the churn of clothes. It's not about a basic need to be warm and protected. It's about maintaining a constant source of novelty by buying new clothes almost every week. In my experience, half of the clothes they buy don't fit and/or they don't like them when they get them home.
When I was little my mum used to buy most our clothes second hand from car boot sales and the like. I can't believe people buy brand new children's clothes. You know they are going to grow out of them. Unfortunately, in the UK at least, second-hand clothes have been largely stigmatised and many people won't even consider them. I have recently seen apps which specialise in second-hand clothes. This would be great but I think it's going to take a lot to convince people not to think of clothes and consumables.