AFRICA: Cotton made in Africa cuts ecological footprint
The ecological footprint of cotton from the Cotton made in Africa (CmiA) initiative has been found to be "considerably smaller" than conventionally grown cotton, according to a new study.
The Initiative's sustainable cultivation methods reduce greenhouse gas emissions by over 70% and save around 18,000 litres of water per kilogram of cotton lint compared to Pakistani cotton, according to research from the Systain consulting firm.
Around 420,000 smallholder farmers from Benin, Burkina Faso, Côte d'Ivoire, Malawi, Mozambique, Zimbabwe and Zambia participate in the programme - and last year around 20m items made from their cotton entered the market.
CmiA cotton is grown exclusively using rain-fed cultivation methods, meaning the smallholder farmers do without any form of supplemental irrigation. At zero cubic meters of freshwater per kilogram of cotton lint, this gives CmiA cotton a clear ecological advantage over conventional cotton with an index of five cubic meters per kilogram.
Translated to the amount of cotton needed to manufacture a T-shirt, CmiA conserves around 2,000 litres of water through the sustainable cultivation of the raw material alone.
The amount of freshwater used to grow cotton is measured as stress-weighted water consumption. This means that water usage in water-poor regions is given greater weight than that in water-rich regions.
According to the study, 1.9 kilograms of greenhouse gasses (GHGs) are released per kilogram of CmiA cotton lint. Conventional cotton in contrast emits 4.6 kilograms per kilogram of lint, 2.4 times as much.
70% of the GHGs released by CmiA result from the production and use of fertilizers. CmiA produces no emissions from mechanical energy used to work the land, while these account for 34% of all emissions for conventionally grown cotton.
In training, CmiA smallholder farmers learn about modern and efficient cultivation methods. These include the correct application of pesticides, efficient use of fertilizers, and measures to maintain soil fertility. CmiA prohibits the use of pesticides on the Rotterdam Protocol and Stockholm Convention lists and those classified by the WHO as 1a and 1b.
Analysis of GHG emissions and water consumption were done using the life cycle assessment or Eco-Balance method as defined by the International Standardization Organization (ISO 14040:2006).
The Eco-Balance method involves the systematic analysis of the environmental impacts of all stages - all products, methods and services - of a product's lifecycle.
These include all the environmental impacts resulting from production, use, and disposal or recycling, along with upstream and downstream processes such as the manufacture of raw materials, additives and fuel.
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