Beda Rasinen Finlaysonilta vetosi vastauksessaan tähän tutkimukseen (pdf):
https://textileexchange.org/wp-content/uploads/2017/06/TE-LCA_of_Organic_Cotton-Fiber-Summary_of-Findings.pdfLähetin hänelle seuraavan vastauksen:
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Beda Rasinen
Finlayson
Hei, kiitos vastauksesta.
Mutta kuten epäilinkin, reilusta vertailusta ei ollut kyse.
Relevantti on yhteenvedon s. 15. Siellä kerrotaan:
"In the regions under study, organically cultivated cotton receives relatively little irrigation in addition to naturally occurring rainfall. The irrigation water requirement of a crop is mainly determined by climatic conditions and the actual usage is also influenced by irrigation techniques. This is why low irrigation rates cannot be attributed exclusively to the organic cultivation scheme.
All regions under investigation in Cotton Inc. 2012 are at least partially irrigated. As a consequence, blue water consumption – the impact category with a high environmental relevance – of conventional cotton is reported to be 2,120 m³/1,000 kg cotton fiber (results of this study 182 m³/1,000 kg lint cotton fiber )
Figure 8: Blue water consumption of the global average organic cotton fiber production shown for 1,000kg of product at gin gate
Figure 9: Comparison of blue water consumption result against conventional benchmark"
"Sinisen veden" (keinokasteluveden) kulutus luomupuuvillassa oli minimaalista, mutta kokonaisvedenkulutus luomupuuvillalla kuviossa 8 oli yli 14 000 litraa puuvillatonnia kohti. Sama kyllä sanottiin edelläkin sivulla 14:
"The global average total of water consumed while producing 1 metric ton of organic cotton fiber is 15,000 m3."
Siinä mainitussa suomenkielissä artikkelissa puhutte kuitenkin "vedestä" eli siis kokonaiskulutuksesta. Käytitte siis noita "sinisen veden" suhdelukuja kuvaamaan koko tilannetta.
Tähän haluan tuoda rinnalle toisen tutkimuksen, josta yhteenveto löytyy tästä artikkelista:
https://qz.com/990178/your-organic-cotton-t-shirt-might-be-worse-for-the-environment-than-regular-cotton/"It will take you about 290 gallons of water to grow enough conventional, high-yield cotton to produce a t-shirt, according to Cotton Inc. To grow the same amount of organic cotton for a t-shirt, however, requires about 660 gallons of water. The disparity is similar for a pair of jeans. (It’s worth noting that Cotton Inc., a not-for-profit group, works to help boost the industry’s demand and profitability—though it insists any claim it makes must be vetted by its legal department and the US Department of Agriculture.)"
Siitä tulee siis täsmälleen päinvastainen kuva asiasta.
Ystävällisesti
Heikki Jokipii
Lsy. TM-TL ry
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Keskustelumme voi tietysti yhä jatkua.