Over time, due to sunlight, waves, and physical breakdown, larger plastics degrade into microplastics, smaller than 5 millimetres in size. These tiny particles make their way into rivers, lakes, and oceans through various routes from urban run-off and wastewater to agricultural soils and even the air. Microplastics, from industrial and domestic sources, persist in nature and enter our bodies through water and seafood. Once coated with biofilms, they become carriers of toxic chemicals, heavy metals, and antibiotic-resistant pathogens, forming a harmful “plastisphere.” This poses a serious risk and enhances pollutant transport, threatening human health and biodiversity. The cover story in this edition of TerraGreen underscores prevention, advanced wastewater treatment, sustainable plastic alternatives, and public awareness as crucial measures to curb this invisible yet pervasive threat.

Microplastics, though invisible to the naked eye, are fast becoming one of the most pressing environmental threats. Tackling them demands a mix of engineering innovation, natural solutions, and responsible consumption. Prevention at the source is key — washing machine filters that trap synthetic fibres, tire wear collectors, and eco-friendly paints are already making a difference. Wastewater treatment plants, equipped with advanced filters and ozonation, can remove up to 99 per cent of tiny particles, though nanoplastics remain a daunting challenge. Nature, too, offers remedies: wetlands and buffer strips slow run-off, while bio-coagulants from okra and moringa provide affordable solutions in rural areas.

Yet, technology alone cannot solve the crisis. Policies like ‘Extended Producer Responsibility’ push companies to rethink plastics, while advanced recycling keeps materials in use. As a matter of fact, choosing natural fabrics, avoiding microbeads, supporting sustainable packaging, and spreading awareness could certainly be wiser choices that can create ripple effects. With strong policies, innovative thinking, engineering breakthroughs, and sustainable community action, we can protect the planet from being adversely impacted by the tiny microplastics. Let us take a collective resolve to be part of this noble journey and save our planet.

We believe you will find each article in this issue thought-provoking and inspiring, with stories that fuel hope and reinforce our shared commitment to a greener, and cleaner future.