Chapter 9: Have other resources been used appropriately?
Efficiency in the use of water, raw materials and energy, paired with demand reduction, is another aspect of sustainable procurement.
Source reduction is an important strategy for reducing the consumption of raw materials while maintaining efficiency and usability of the products. Source reduction goes beyond recycling by attempting to reduce negative environmental impacts throughout the entire life cycle of the product. Design, manufacturing, usage, sales (including packaging), and final disposal are all part of source reduction (Box 11).
Benefits of source reduction include:
The benefits of source reduction should be considered in light of consequences for performance and usability. A lower-performing paper using fewer resources per unit of product may create a false sense of economy of resources if it requires more units of the product to accomplish the task. This is particularly true for some products that undergo specialized treatment and processing to enhance performance and usability (e.g., tissue with additives to soothe skin, stronger and more durable paper, and so on)
Besides wood, energy remains the most expensive part of the manufacturing process for the pulp and paper industry. While energy efficiency has improved dramatically in the last few decades, the manufacturing processes of many products still consume considerable amounts of energy. Energy reduction is of strong interest to the forest products industry.
There are pulp mills that burn residual biomass to both meet their own energy needs, and to sell surplus energy to the grid. Most mills do not, however, either because they have not been equipped with sufficiently modern technology or because the production process does not generate biomass residue as a by-product (such as mechanical pulping).
Demand reduction can be a positive and important element of a sustainable procurement strategy. Reusing the back side of paper, using double-sided printing, using lighter products, etc. are all ways to reduce wasteful consumption.
A life cycle assessment (LCA) is a tool to objectively evaluate the overall environmental impacts associated with a product. LCA assesses the product and the inputs (energy, raw materials, water, etc.) and outputs (pollution to soil, water, oil, etc.) in a product’s life cycle from raw material extraction to final disposal. LCA is not a risk assessment tool because it stops at quantifying emissions without assessing their impacts. Additionally, LCA is a data-intensive methodology and data limitations (out-of-date, lack of data, or omissions) are common.
LCA is a useful tool to identify, prioritize and target actions to minimize negative environmental impact. LCAs can also be used to compare the environmental impact of alternative raw materials.
A number of LCAs have been completed for various wood-based products including:
laundered cloth diapers, and home-laundered cloth diapers
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Some of the drawbacks of LCAs include:
A list of resources on LCA can be found in Section V.