Did you know the total greenhouse gas emissions from textiles production, at 1.2 billion tonnes annually, are more than those of all international flights and maritime shipping combined? 
There is a lot that can be talked about with regards to fast fashion and the production of clothing but as this is a Small Step the focus is on shopping second-hand.
A 2017 WRAP report estimates an increase of 10% in second-hand sales could deliver environmental benefits, cutting carbon emissions per tonne of clothing by 3% and water use by 4% water. 
In 2018 fast fashion was growing at an unsustainable rate with consumption rising around 5 times since the 1980s. At this point consumption of new clothing was higher in the UK than any other European country – 26.7kg per capita.
Every time you are looking for a new item, be it clothing, books or household goods could you look to see if it were available second hand first?
First place I start when looking for second hand items are local charity shops – you can find local shops to you at the Charity Retail Association.
I am also a huge fan of Vinted and have found some great bargains such as my second-hand watch which retailed new at £95 but was being sold for £10 as the battery had stopped. A new battery and it was good as new!
Perhaps next time you are looking to buy anything you could look at second-hand options first?