The Trace We Leave: Twenty Years of Waste & What It Reveals – is Muntasir Mamun’s personal and evidence-based account of two decades of the International Coastal Cleanup® in Bangladesh. Beginning with a small group of volunteers travelling from Dhaka to Cox’s Bazar, the book follows an initiative that gradually became a movement, a community and a long-term record of environmental change.

Year after year, volunteers returned to Cox’s Bazar and St. Martin’s Island to collect, count and document coastal waste. Over time, recognizable objects such as bottles, shoes and fishing gear increasingly gave way to wrappers, thin plastic films, foam and fragmented materials. Waste had not simply increased. It had changed in form, value and behaviour.

Drawing on field notes, photographs, cleanup records, research and lived experience, the book examines what discarded materials reveal about Bangladesh’s changing economy and culture. A food wrapper becomes evidence of a larger system involving packaged consumption, tourism, informal retail, corporate production, recycling economics and public policy.

Bangladesh’s geography is central to this story. As a densely populated delta shaped by the Ganges, Brahmaputra and Meghna river systems, the country receives, carries and redistributes waste through rivers, floodplains and coastlines. St. Martin’s Island becomes a particularly revealing case, where tourism brings packaged goods and disposable products faster than the island can collect, process or remove the resulting waste.

The book also tells the story of the people who kept returning. Students became organizers, volunteers brought their families, and fishermen, shopkeepers, residents, businesses and institutions gradually became part of a movement without a single centre.

Yet The Trace We Leave is equally honest about the limits of cleanup. Removing waste from a beach may create an immediate result, but it does not stop more waste from being produced. Awareness campaigns, corporate sponsorship and policy announcements can create visibility without changing the systems that drive consumption and disposal.

Moving between memoir, field record and environmental analysis, Mamun explores tourism, informal recycling, corporate responsibility, Extended Producer Responsibility, policy failure, media representation and microplastics. His central argument is clear: coastal waste is not simply the result of careless individuals. It is the visible residue of how products are designed, distributed, consumed and abandoned.

With a foreword by Nicholas J. Mallos of Ocean Conservancy, The Trace We Leave is a reflection on persistence, responsibility and the lasting marks humanity leaves behind.