Chinese fast-fashion retailer Shein has been hit with a lawsuit by rival Temu, alleging the company has engaged in aggressive an unlawful tactics to try and thwart the competition.

In the past few years, Shein has gained a following among teenagers and young adults drawn to its inexpensive and wide-ranging merchandise, like $10 dresses and $3 packs of fake eyelashes.

Shein's popularity has shot up during the pandemic, ... It's a huge challenge, with the fashion industry accounting for up to 8% of global carbon emissions, according to one UN study.