Edition #11 - Designing Products for a Cleaner Future

In our last newsletter, we began exploring Sustainable Product Design and introduced the idea that unsustainability usually occurs when we:

• Deplete a resource – eventually it runs out, or becomes increasingly costly or damaging to access.
• Accumulate or concentrate something – to the point where it becomes toxic or harmful.

This week, we’ll focus on the second aspect: accumulation.

In natural ecosystems, the concept of waste does not exist. Every material and nutrient cycles through biological and chemical processes, continuously reused and transformed in ways that sustain life. Waste, as we understand it, is a human invention. A byproduct of industrial processes and product systems that leave behind substances in forms or concentrations nature never intended.

This accumulation of materials and chemicals outside natural cycles leads to pollution, toxicity, and long-term harm to ecosystems and human health.

Throughout a product’s lifecycle, from:

• raw material extraction and processing,
• through manufacturing and use,
• to end-of-life disposal,

waste and harmful substances can build up in the environment with serious consequences.

During extraction and processing, resource-intensive activities can generate pollution and concentrate toxic substances. In use, products may shed microplastics or release chemicals that enter air, water, or soil. At end-of-life, landfilling or incineration can lead to further accumulation and leaching of hazardous substances, as well as the loss of valuable materials that could otherwise be recovered.

Understanding and managing these flows of materials and pollutants is critical to reducing environmental and health risks. It requires careful selection of product materials, thoughtful design to minimise waste and shedding, and strategies that anticipate the product’s full lifecycle impacts, including what happens when it reaches disposal.

Below are some key examples of how accumulation manifests and why it matters for sustainable product design:

• Water: Plastics from products and packaging break down into micro- and nano-particles that bioaccumulate in organisms and disrupt aquatic ecosystems. Heavy metals and chemical additives, released during manufacturing, use, or disposal, persist in water and sediments, accumulating in organisms and causing toxicity through the food chain.
• Soil: Toxic substances such as pesticides, fertilisers, and heavy metals from product use or disposal contaminate soil, reduce fertility, and enter food chains.
• Air: Emissions from manufacturing, product use, and landfill release particulates, Volatile Organic Compounds (VOCs), and greenhouse gases, degrading air quality and driving climate change.
• Bioaccumulation: Hazardous chemicals in products, including Persistent Organic Pollutants (POPs) and Short-Chain Chlorinated Paraffins (SCCPs), persist in living organisms, concentrating up the food chain and causing toxicity.
• Landfill: Complex or poorly designed products often end up in landfill, where valuable resources are lost, and toxic substances leach into soil and water. Organic waste and composites emit methane, a potent greenhouse gas.

Understanding how these forms of accumulation arise throughout the product lifecycle, from material sourcing and manufacturing to use and disposal, helps identify critical intervention points. Sustainable product design seeks to minimise harmful material inputs, reduce waste and emissions during production and use, and enable safe end-of-life management to prevent environmental accumulation.

The principles of the circular economy offer a strong starting point for many product businesses. These are:

1. Eliminate waste and pollution (addressing accumulation)
2. Circulate products and materials at their highest value (addressing depletion)
3. Regenerate nature (reversing degradation)

A circular economy prioritises activities that preserve embedded value, energy, labour, and materials, by designing for durability, reuse, remanufacturing, and recycling. The goal is to keep products, components, and materials in use and out of waste streams for as long as possible.

However, without a deeper understanding of a product’s environmental impact, businesses can easily oversimplify and misapply these principles. A common pitfall is focusing solely on recyclability as a way to “close the loop,” with little consideration for the toxin accumulation and environmental degradation that can occur over repeated cycles. Circulation alone is not enough. Overlooking the phrase at their highest value, leads to downcycling rather than true value preservation. The third principle, regenerate nature, is frequently absent from circular strategies, resulting in outcomes that contribute to environmental degradation rather than repair. The circle should be spiralling upwards and not be a spiral to the bottom.

True circularity demands on more than just keeping materials moving; it requires thoughtful, regenerative design that acknowledges limits and builds back value at every stage.

A valuable tool to use to gain a more comprehensive understanding of a products environmental footprint is a Life Cycle Assessment (LCA). We will look more at this tool in the next newsletter.