For decades, the phrase ‘reduce, reuse, recycle’ has dominated environmental conversations. It is catchy, familiar, and often plastered on posters, bins, and schoolbooks around the world. However, despite its popularity, this mantra has sometimes distracted us from the broader perspective. Recycling, while valuable, is not enough to address the scale of today’s environmental challenges. Plastics continue to fill our oceans, food waste piles up in cities, and transport systems keep fueling climate change.
Nearly 4,000 tons of food is discarded as waste in Sri Lanka in a day and approximately 65% of it is total solid waste. Over 1.6 million tonnes of plastic waste is generated in the country annually. These numbers truly are alarming.
What if sustainability was not only about sorting our trash at the end of the chain, but about preventing waste and pollution in the first place? This is where the avoid-shift-improve (ASI) framework comes in.
First developed in the early 1990s by German and Dutch transport researchers as a way to structure sustainable transport policies, over time, this framework has been adapted beyond transport because the logic is simple and universal.
This concept asks us to think differently about how we live. First, avoid what is not necessary. Second, shift to smarter alternatives when needs must be met. Finally, improve the efficiency of what remains. It is simple, practical, and powerful: an everyday toolkit for building a lighter footprint on the planet and it can also be integrated into our society as well.
Less is more
The greenest product is the one that never had to be made. The most sustainable journey is the one that never needed to happen. That is the essence of ‘avoid’. It is about pausing before we act and asking: Is this truly necessary?
Think about shopping habits. Single-use plastics, sachets, shopping bags, and plastic straws are still common despite bans. Also, in a society that encourages constant upgrading and impulse buying, resisting the urge to click ‘add to cart’ is a quiet rebellion. A 24-hour pause before making non-essential purchases often reveals that the desire was fleeting, driven by marketing rather than need. Avoiding unnecessary consumption saves money, reduces waste, and shrinks our environmental footprint without us lifting a finger on recycling.
Avoidance also matters in food, which makes up a good portion of the bulk of Colombo’s daily garbage. Globally, nearly a third of food produced never gets eaten, and when dumped into landfills, it produces methane, a greenhouse gas far more potent than carbon dioxide. Careful meal planning, buying realistic quantities, and storing food properly all help ensure that what is grown is actually consumed. The same thinking applies to travel.
Combining errands into a single trip, opting for a video call over an in-person meeting, or simply walking instead of driving are ways to avoid unnecessary journeys altogether.
Living by ‘less is more’ does not mean living without joy. It means finding value in experiences, relationships, and time rather than in endless things. Avoidance is not deprivation. It is an intention.
New paths
When we cannot avoid it, we can shift. Shifting is about meeting our needs in better ways, healthier for the planet, and often healthier for us too.
Transport offers obvious opportunities. Instead of defaulting to the car for every trip, shifting to public transit, carpooling, cycling, or walking, reduces emissions dramatically. Though this is not often practiced in Sri Lanka, in many cities around the world, more people are rediscovering the pleasure of walking short distances or hopping on a bike instead of sitting in traffic. Shifting modes of transport improves the air quality, cuts congestion, and boosts physical well-being.
Consumption habits also benefit from a shift. Buying secondhand, choosing refurbished electronics, or borrowing items that we rarely use are all ways to get what we need without fueling new production. Think of tools, party outfits, or even children’s toys, things that serve their purpose but don’t need to be bought brand new. Every item reused or repurposed keeps valuable materials in circulation and avoids the hidden environmental costs of manufacturing.
Food choices too are fertile ground for shifting. Livestock production is one of the biggest contributors to greenhouse gas emissions, while plant-based proteins have a far smaller footprint. Shifting toward more plant-centred meals, even a few times a week, has an outsized effect when adopted collectively. Seasonal and locally grown produce is another smart shift. It cuts transportation emissions, supports regional and local farmers, and usually tastes fresher too.
Shifting is not about perfection. It is about creativity and flexibility, finding new paths to meet our needs with less impact.
Smarter systems
Not everything can be avoided or shifted, which is where ‘improve’ comes in. Improvement is about efficiency: doing necessary things in the best possible way.
At home, that might mean replacing old bulbs with light emitting diodes, investing in energy-efficient appliances, or insulating walls and windows to reduce heating and cooling needs. Even small steps like keeping tires properly inflated improve fuel efficiency and reduce emissions for those who use vehicles.
Food systems also benefit from improvements. Better storage techniques, airtight containers, cooling at proper temperatures, or simple habits like labelling leftovers extend the life of produce and reduce waste. On a larger scale, businesses can improve packaging by making it lighter, recyclable, or compostable, while industries can adopt cleaner production technologies to cut pollution at the source.
Cities and the government have their part to play too. Smarter waste management systems, investment in renewable energy, and water-saving technologies are all improvements that help societies live well with less strain on resources. Improvement acknowledges that some activities are unavoidable, but insists that they do not have to be wasteful.
Why does this matter to us?
What makes ASI so powerful is its order of priorities. Too often, sustainability efforts start at the ‘improve’ stage, buying efficient appliances, driving hybrid cars, or recycling diligently without asking whether the activity was even necessary in the first place. The ASI framework reminds us that avoiding waste is more effective than managing it, and shifting to better choices is more impactful than tweaking the status quo.
Equally important is that this framework works at every level. For individuals, it shapes habits like how we shop, eat, and travel. For businesses, it influences decisions about design, production, and supply chains. For policymakers, it guides investments and regulations that encourage the avoidance of waste, shifts to better options, and improvements in efficiency. Each layer reinforces the other, creating a ripple effect of change.
In a world where climate change, biodiversity loss, and resource scarcity are pressing realities, the ASI framework provides a pathway that is both practical and scalable. It does not require radical perfection, only mindful progress. Every choice to avoid, shift or improve builds resilience not just for the planet, but for economies, communities, and personal well-being too.
Recycling will always have its place, but it cannot carry the weight of sustainability on its own. True change requires us to go further, preventing waste before it begins, seeking smarter alternatives wherever possible, and making what remains as efficient as modern innovation allows. Beyond recycling lies an opportunity to rethink how we live, to weave sustainability into our daily lives through small but intentional choices.
For us Sri Lankans, this is an opportunity to rebuild stronger, grounded in less waste, wiser consumption, and resilient systems. The only question is whether we will seize this moment while change is still within our control, or wait until inaction leaves us with no choice at all.
(The writer is an electronics engineer with a background in information technology and sustainability)
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The views and opinions expressed in this article are those of the author, and do not necessarily reflect those of this publication