Every flush by a typical toilet sends about 6 to 16 litres of fresh water to wastewater treatment centres.
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.
Environmentally friendly toilets on display at the Reinvented Toilet Expo in Beijing on November 8.
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.
If you want to live like a local when on holiday, you should defecate like one.
Reusing and recycling of plastic waste makes more sense for Kenya than a ban.
The plastic bag ban doesn't consider the impact it will have on Kenya's economy or consider other environmental alternatives.
Olympic rowers train in waters near Rio. The lack of sufficient treatment has raised health concerns for athletes.
Expecting the rest of the world to adopt expensive, centralized sewage treatments systems common in the U.S. is not realistic.
The Western Treatment Plant in Werribee, Victoria, largely powers itself using biogas – a by-product of sewage treatment.
Jason Patrick Ross/Shutterstock
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