Your cotton T-shirt has about the same carbon footprint as driving a car for 5 miles. That may not seem like a lot, but it adds up. Each year, cotton clothing is responsible for greenhouse gas emissions equivalent to driving to the sun and back more than 1,000 times, or removing about 10% of the US's passenger vehicles off the road, according to an MIT report released this week.
Nowadays men dressing for a night on the town may still wear a smart shirt, but it is likely to be untucked and open at the collar. In fact, dress codes have relaxed so much, it can now be acceptable for the modern male to work tie-less or in short-sleeved shirts - all without the covering of a waistcoat or jacket.