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but you can reduce their environmental impact
You can lighten your cotton impact if you use a shoe made with organic cotton,[link widoczny dla zalogowanych], which uses none of these synthetic chemicals and requires about half as much energy to produce as the conventional version, according to a 2005 report from the Stockholm Environment Institute. (Organic cotton is not without costs, though: It takes more land to grow organic than conventional cotton.)
Then there the ingredient that makes sneakers special: the rubber outsole. Rubber-soled sneakers were first marketed in 1917, and Bill Bowerman helped rocket the Nike company to prominence in 1972,[link widoczny dla zalogowanych], when he sculpted new soles by pouring rubber into a waffle iron. Most of today sneaker outsoles are made from synthetic rubber.
According to the World Wildlife Fund, the manufacture of synthetic rubber results in the release of more waste than the volume of rubber produced. That waste includes several forms of volatile organic compounds,[link widoczny dla zalogowanych], some of which are suspected carcinogens.
Unfortunately, it tough to avoid synthetic rubber in sneakers. Some companies sell models with recycled car tires rather than virgin synthetic rubber, but few are suitable for serious running. Natural rubber is also better for the environment than synthetic,[link widoczny dla zalogowanych], but few shoemakers use it.
If all of this has you ready to throw your hands up and plop your backside down on the couch for good,[link widoczny dla zalogowanych], some footwear companies have begun rating the environmental impact of their products.
Timberland,[link widoczny dla zalogowanych], for example, ranks its products on a scale of zero to 10. Such scales are a big step,[link widoczny dla zalogowanych], but keep in mind that most of them are done by the manufacturer,[link widoczny dla zalogowanych], not by a disinterested third party.
In 2011,[link widoczny dla zalogowanych], Puma won some green cred by becoming one of the first major corporations to quantify its overall impact on the environment, but quantifying overall corporate impact doesn help consumers choose between shoe models.
Of course, you could just forget the shoes and join the ranks of the barefoot running movement. Although its impact on your joints is still a matter of debate,[link widoczny dla zalogowanych], its impact on the environment is unquestionably lighter.
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