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Hi Remi,

Curiosity is always a great thing. Out of intuition, I would say that more people rely on flushing as this is the preferred option for most of Asia, Europe, Russia and the America's (pit latrine can be off-set flushing - and thus there are flushers who squat). Though it does make me wonder: any statistics on rural china? Though we do need to distinguish between the amount of toilets and the number of people using it - with indeed pit latrines often in higher usage than the modern toilets in America and Europe.

The interest in the question actually lies in the water consumption; if half of the people rely on flushing, then we really create a lot more sludge than if we use pit latrines. Inventions such as the Satopan can have massive consequences on water consumption and saving.

However, there are two other interesting questions: - What is more popular: squatting or sitting? - What is more popular: water or toilet paper?