How long do you think it takes for your crusty T-shirts to decompose in a landfill? Four months? Three years? A few decades? Surprise! It can take 200+ years for clothes to decompose in a landfill, and they'll emit methane throughout the decomposition process.
That's why it's imperative to "wear it 'till it's worn." :D There are a few things you can do to minimize the carbon costs of your clothes.
Avoid fast fashion. Don't worry, you can still be stylish.
Thrift some of your clothes. You'd be surprised at what you might find.
Participate in clothing exchange programs, like TU's very own ReWear!!!