Are shoppers to blame? The Chinese factories where the huge fast fashion company's clothes are made are under the spotlight.
Shein workers exploited for £6 shirts
Unethical: Shein, founded in China and now headquartered in Singapore, has been criticised for exploiting low-paid workers in China to sell its clothes at knockdown prices. Workers do 75-hour weeks, earning less than 1p per garment. Glossary
Guangzhou - The fifth most populous city in China.
Fast fashion - Cheap clothing produced quickly by big retailers in response to the latest trends.
Wages - The money you earn from your job.
Cotton - A soft, white substance that grows as part of the cotton plant and can be made into fabric.
Uyghurs - A largely Muslim ethnic group native to Xinjiang, in northwestern China. Since 2014, the Chinese government has subjected them to abusive measures, including forced labour, internment camps and forced sterilisation.
Emissions - Things that are released, such as gases, as part of a process. E.g. greenhouse gases.