Just read this. I guess we can add another way kilts are superior to most trousers!

http://www.slate.com/id/2151797/?nav=tap3&GT1=8805

Closet Case
The CO2 monster hiding in your wardrobe.
By Meaghan O'Neill and treehugger.com

Your closet may not be the first place you'd think to look to reduce your CO2 output. But clothing manufacture involves agriculture, industry, and commerce, so our fashion choices make a statement about greenhouse gasses as well as style.

Chances are that a good portion of what's hanging in your closet is made from cotton. The fiber is tough to grow, so cotton farmers use enormous amounts of energy-intensive, CO2-emitting chemicals and fertilizers. To produce one pair of regular cotton jeans takes three-quarters of a pound of fertilizers and pesticides. Each T-shirt takes one-third of a pound. The farming of organic fibers, by contrast, releases less CO2 into the air and uses 50 percent less energy. Cotton, hemp, bamboo, ramie, linen, and silk can all be grown organically. (And hemp and bamboo are pretty good for your CO2 count, even when they're not organic, because they need little if any fertilizer to grow.) Organic wool, alpaca, and cashmere are also excellent choices. So is lyocell, a textile made from wood pulp. Anything in your closet made of nylon, polyester, or acrylic, on the other hand, comes drenched in CO2-laden petroleum (not literally, but you get the idea).

Mindful of the growth of the organic-food market, manufacturers, such as Patagonia, Nike, Levi's, and even Wal-Mart are starting to buy organic textiles. In fact, demand for organic cotton far outstrips supply—only 6,577 acres of certified-organic cotton were planted in the United States last year, less than 0.05 percent of cotton acreage overall. (Even at that low rate, the United States, along with Turkey, is the world's largest producer of organic cotton.)