The findings were revealed in an online survey about textile recycling, conducted by Recycle Now.
Just 39 per cent of those polled consider the environmental impact of throwing away clothes and 63 per cent of clothing goes to landfill biodegrading and creating damaging greenhouse gases.
It is hoped Recycle Now and charity shop chain Oxfam will help save billions of pounds worth of wearable clothes going to landfill over this years Recycle Week by encouraging people to wear more of their wardrobe and unwanted recycle items.
Oxfam trading director David McCullough said: Recycling clothes is just as important as reusing or recycling any other material. A huge amount of natural resources go into the production of clothing, so while its easy to get wrapped up in fast fashion, spare a though for the environment, as well as your purse!
Staggeringly, producing clothes uses ten times more energy than producing steel or glass.
Recycle Now marketing manager Laura Underwood said: Recycle Week is a great opportunity to remind us how easy it is to waste less and reuse more of the things we buy.
Research showed that each person in the UK spends around £600 on clothes each year and discards £400. However, England sent 112 million tonnes of household textiles to be recycled in the past year, which is almost double the amount five years ago.
Recycle Week is running from 22-28 June.