The fashion's industry disastrous footprint is well documented. 85% of clothes is dumped every year https://www.weforum.org/agenda/2020/01/fashion-industry-carbon-unsustainable-environment-pollution/
Consumer demand does not come out of nowhere. Beyond a few basics, it is more or less arbitrary, culture defined and largely engineered. This is well documented. There is no chicken/egg, it is a cyclical process that started circa 1890 and never stopped. Read e.g., Land of Desire by William Leach.