Un-Green Clothes

Already, the textile industry accounts for more greenhouse-gas emissions than all international flights and maritime shipping combined; as recycling markets break down, its contribution could soar. - Bloomberg, via Bayou Renaissance Man

Airlines burn a large quantity of fuel, but I suspect it is less than 10% of what we burn in our automobiles. Big ships consume huge quantities of oil, but they do it slowly, and there are only a few of them operating, at least compared to airliners. So we aren't talking about the end of the world, but textiles? How does textile manufacturing produce so much green-house gas?