As climate change threatens to bring more sudden rainstorms, we need to rethink the way we manage water.
Women in developing countries are burdened by the lack of access to proper toilets in their homes, communities, schools and public spaces.
Existing toilets aren't a good fit for parts of sub-Saharan Africa because many areas lack water and there's often no proper plumbing.
There are numerous examples of failed aid projects, where sanitation systems have been installed without consulting local people, then abandoned by the community after the project team has departed.
Men spend, on average, around 60 seconds in a toilet, while women spend 90. This is for many reasons, including biology. This leads to a bottleneck that keeps women waiting around to use the loo.
Politicians on the right surely wipe with their left hand; and vice versa?
Sit v squat – the big public toilet stand-off.
What it's like trying to use a public loo when they aren't designed for you.
An expert explains how often you should poo and what it should look like.
Do canal boats have toilets? Yes, and they're greener than your average bog.
Just because something is advertised as 'flushable' doesn't mean you should put it in your toilet.
South Africa is a water-scarce country where inequity and a lack of fairness and justice pervades water distribution.
If you want to live like a local when on holiday, you should defecate like one.
More than half of the global population do not have safe sanitation. What is the best way to go about changing this?
Opening the minds of worried new parents to other ways of raising children may assuage fears that if they fail to 'do the right thing,' their children will be doomed.
Incontinence is frighteningly common.
Cultural, social and environmental factors all matter if India wants to succeed in its goal to boost sanitation.
You flush the toilet. Down it goes. What happens after that? Clancy, age four, wants to know.
Modern sewerage infrastructure, exported from Britain to the globe, is entirely dependent on water. In a world of growing climate extremes, it's time to look beyond this colonial legacy.
The invention of the flush toilet was probably one of the most unsustainable innovations in human history.