Toilets – a wasted opportunity: author takes a deep dive into sanitation and how to make it better and save the planet
- Only half the world has safe toilets, the WC is inefficient and pit latrines are ticking ‘sludge bombs’, writes Chelsea Wald in her deep dive into sanitation
- She looks at how toilets could be made better and more accessible, such as by harnessing nature to turn our waste into useful products

Pipe Dreams: The Urgent Global Quest to Transform the Toilet by Chelsea Wald, Avid Reader Press
The “eww” factor is undeniable, but in 2003 Hong Kong stopped holding its nose when the subject of toilets arose. That was the year Sars visited Amoy Gardens, in Kowloon, sickening hundreds of residents, killing 42 of them, and leaving a miasma of mistrust about the city’s sanitation infrastructure. Soon, Hongkongers were readily discussing everything from water closets to soil stacks to floor drains to U-bends.
More recently, another tragedy, in India, befell sanitation workers asphyxiated by noxious fumes while trying to unblock a sewer. The deaths, of Dalits, the lowest rung of caste usually assigned such work, raised afresh concerns about latrines introduced during Prime Minister Narendra Modi’s Clean India Mission. The irony was especially tragic in a country where the problem of open defecation continues, despite government efforts to change habits.
These and other deadly incidents are recalled in Pipe Dreams, by Netherlands-based American science writer Chelsea Wald. She doesn’t mince words in explaining the book’s subtitle: The Urgent Global Quest to Transform the Toilet – where it even exists. “Less than half of the world’s population can access a toilet that safely manages bodily waste,” she says, via Zoom, from The Hague. Even for those blessed with the gold standard, “it is inefficient, squandering clean water as well as the nutrients and energy contained in the waste we flush away”.
Her all-encompassing book points to work, by engineers, scientists and entrepreneurs, among others, who, she hopes, will create other gold-standard toilets to take the place of a modern miracle that has not aged well. More than a century since deadly cholera and typhoid fever outbreaks in Britain led to the Victorian-era innovation that still serves many of us today, little about the intrinsic design of this essential infrastructure has changed: pee, poo and toilet paper plop into water and are flushed into a sewer connected to a treatment plant. Pipe Dreams covers what happens to the sludge, and radical alternatives to this system.