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2. Low-flush toilet - Wikipedia

   en.wikipedia.org/wiki/Low-flush_toilet

   A low-flush toilet (or low-flow toilet or high-efficiency toilet) is a flush toilet that uses significantly less water than traditional high-flow toilets. Before the early 1990s in the United States, standard flush toilets typically required at least 3.5 gallons (13.2 litres) per flush and they used float valves that often leaked, increasing their total water use.

3. Dual flush toilet - Wikipedia

   en.wikipedia.org/wiki/Dual_flush_toilet

   The lack of siphoning also means that the toilet requires less water to operate. [6] Due to this, the waterline is considerably lower than that in siphon-flush toilets. The toilet has two buttons on the cistern rather than the single-flush one; one button delivers a lesser amount of water (eg. 3 litres) and the other a greater amount (eg. 6 ...

4. Flush toilet - Wikipedia

   en.wikipedia.org/wiki/Flush_toilet

   A flush toilet (also known as a flushing toilet, water closet (WC); see also toilet names) is a toilet that disposes of human waste (i.e., urine and feces) by collecting it in a bowl and then using the force of water to channel it ("flush" it) through a drainpipe to another location for treatment, either nearby or at a communal facility.

5. Container-based sanitation - Wikipedia

   en.wikipedia.org/wiki/Container-based_sanitation

   Example of a toilet used in a container-based sanitation system (urine-diverting dry toilet as marketed by the NGO SOIL in Haiti under the name of "EkoLakay")Container-based sanitation (abbreviated as CBS) refers to a sanitation system where toilets collect human excreta in sealable, removable containers (also called cartridges) that are transported to treatment facilities. [1]

6. Robert F. Kennedy Memorial Stadium - Wikipedia

   en.wikipedia.org/wiki/Robert_F._Kennedy_Memorial...

   It offered 50,000 seats, each 22 inches (56 cm) wide (at a time when the typical seat was only 15–16 in (38–41 cm)), air-conditioned locker rooms and a lounge for player's wives. It had a machine-operated tarpaulin to cover the field, yard-wide aisles, and ramps that made it possible to empty the stadium in just 15 minutes.

7. Sub-replacement fertility - Wikipedia

   en.wikipedia.org/wiki/Sub-replacement_fertility

   Replacement-level fertility in terms of the net reproduction rate (NRR) is exactly one, because the NRR takes both mortality rates and sex ratios at birth into account. As of 2010, about 48% (3.3 billion people) of the world population lives in nations with sub-replacement fertility. [ 3 ]