(Phnom Penh): When people think about climate change, they often picture smokestacks, vehicles, and power plants. Yet one of the most overlooked contributors to greenhouse gas emissions is something we encounter every day: waste.

Every plastic bag discarded, every piece of food thrown away, every pile of garbage left unmanaged, and every landfill fire contributes in some way to environmental degradation and climate change.

As populations grow and economies develop, waste generation is increasing worldwide, making climate action in the waste sector more important than ever.

Waste contributes to climate change primarily through the release of greenhouse gases. When organic waste such as food scraps, agricultural residues, and garden waste decomposes in landfills without sufficient oxygen, it produces methane, a greenhouse gas more than 25 times more powerful than carbon dioxide over a 100-year period.

In addition, open burning of waste releases carbon dioxide, black carbon, and toxic pollutants into the atmosphere. Plastic waste, in particular, poses a dual threat. It pollutes land, rivers, and oceans while also contributing to greenhouse gas emissions throughout its production, transportation, and disposal lifecycle.

Climate action in the waste sector begins with a simple principle: produce less waste.

Reducing unnecessary consumption, avoiding single-use plastics, choosing reusable products, and adopting sustainable lifestyles can significantly reduce the volume of waste entering the environment.

Small changes in daily habits, when adopted by millions of people, can create substantial environmental benefits.

The second climate action is proper waste separation.

Waste should not be viewed as a single stream of garbage. Organic waste, recyclable materials, hazardous waste, and residual waste each require different management approaches. Separating waste at its source allows valuable materials to be recovered while reducing the amount sent to landfills.

Recycling is another important climate action.

Producing products from recycled materials generally requires less energy and fewer natural resources than producing them from raw materials.

Recycling paper helps reduce pressure on forests. Recycling metals reduces energy consumption in manufacturing. Recycling plastics reduces demand for new plastic production and helps prevent pollution.

Organic waste management offers one of the greatest opportunities for climate action.

Instead of sending food waste and organic materials to landfills, they can be composted and transformed into valuable fertilizer.

Composting reduces methane emissions, improves soil health, and supports sustainable agriculture. What was once considered waste becomes a resource.

Modern waste management systems also play a crucial role.

Sanitary landfills, methane capture technologies, wastewater treatment systems, and waste-to-energy facilities can significantly reduce emissions while protecting public health and the environment.

Investments in waste infrastructure are therefore investments in climate resilience and sustainable development.

For countries such as Cambodia, climate action in the waste sector is closely linked to public participation.

Environmental protection cannot rely solely on government policies and infrastructure. It requires the active involvement of communities, schools, businesses, and citizens.

Campaigns that encourage people to reduce plastic use, keep public spaces clean, and properly manage waste are important examples of climate action at the grassroots level.

Every plastic bag avoided, every piece of litter collected, and every household that separates waste contributes to a healthier environment and a more sustainable future.

Cambodia’s efforts to promote cleanliness and reduce plastic waste demonstrate how environmental campaigns can evolve into social movements. Initiatives such as “Today, I Do Not Use Plastic Bag,” “Clean Cambodia, Khmer Can Do,” and “National Roads Without Plastic Waste” encourage behavioural change while contributing to broader climate objectives.

By reducing waste generation and promoting responsible disposal practices, these initiatives help lower emissions and strengthen environmental stewardship.

Climate action in the waste sector also creates economic opportunities.

Recycling industries, compost production, waste collection services, green entrepreneurship, and circular economy initiatives can generate jobs while reducing environmental impacts.

Waste should no longer be viewed merely as a problem to be disposed of. It should be recognised as a resource that can be recovered, reused, and transformed into value.

Ultimately, climate action in the waste sector is about changing the way we think.

For too long, society has followed a linear model: take, use, and throw away. A sustainable future requires a circular approach where materials are used efficiently, waste is minimised, and resources remain in circulation for as long as possible.

Climate change is one of the defining challenges of our generation, but solutions exist in our homes, schools, workplaces, and communities.

The waste sector reminds us that environmental responsibility often begins with simple daily choices.

The future we seek, a clean, green, and sustainable world, will not be built solely through major technological breakthroughs. It will also be built through the habits we adopt, the waste we reduce, and the responsibility we demonstrate toward our environment.

Waste may seem like the end of a product’s life. In reality, it can be the beginning of a climate solution.
=FRESH NEWS