Dual-flush toilets are saving water all over Europe. So why are they so slow to catch on here? Nothing uses more water in a home than flushing the toilet ... s three years older—that uses ...

This is how high the water droplets (aerosols), illuminated here in Crimaldi's lab by intense laser light, go after being ejected when you flush a toilet ... well past nose level for most people.

Chinese scientists calculate that flushing can propel a plume of spray up and out of the toilet bowl, reaching head height and beyond. Droplets can travel up to 3ft - or 91cm - from ground level ...