Agricultural activity is estimated to constitute on average 80% of
the freshwater consumption associated with food products. Freshwater
consumption in the growth of food products is fast emerging as a major
issue for global retailers, including Walmart, Marks and Spencer, and
businesses such as Unilever in a similar fashion to carbon footprinting.
Unlike
carbon, the environmental impacts of water consumption differ greatly
with geography and time. Many freshwater-related issues are local and
freshwater has a strong social and cultural dimension. For example, many
people believe in a “human right to water”. Plentiful water supplies
are clearly desirable, beneficial and necessary.
In New Zealand,
reforms have been proposed to legislation and a collaborative process
involving business, regulators and non-governmental organizations (the
Land and Water Forum) to develop new approaches to water management.
Various initiatives are underway globally such as the water disclosure
project to highlight business related risks to water scarcity,
completion and quality. In the global business community it is beginning
to dawn on companies that freshwater supplies could dry up and there is
a pressing need to understand the risks, not only within their own
operations, but up and down their supply chains.
Hence the growing
interest in comprehensive ‘water footprinting’. The water footprints
are intended to improve consumer understanding of the environmental
impact of freshwater consumption by products and potentially heighten
awareness of options for reducing freshwater consumption within global
supply chains.
Green kiwifruit water footprinting
New
Zealand’s Ministry of Agriculture and Forestry (MAF) and Zespri
International commissioned Landcare Research to assess the water
footprint of green kiwifruit supplied to the U.K. — the environmental
impact of freshwater used, directly and indirectly, throughout all
stages from growing the fruit through to the fruit reaching the
consumer.
The recently completed project, a partnership with Plant
& Food Research and AgriLink, was the first-ever comprehensive
water footprinting exercise to be carried out in the New Zealand
horticulture sector. The study examined environmental impacts of
freshwater used in eight major kiwifruit growing regions.
The
research was designed to look for cost-effective methods to promote
water conservation, preserve important resources, and enable our
industrial partners to communicate important improvements in performance
to their customers. The project reflects Zespri’s commitment to support
positive positioning with key global retailers, who are increasingly
paying attention to the water footprints of suppliers.
The
research evaluated two emerging approaches – the Water Footprinting
Network (WFN) and Life Cycle Assessment (LCA) – and also investigated a
third hydrological-based perspective. Used in tandem, these different
approaches provide deeper insight into the direct and indirect
freshwater consumption by a product.
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