Презентация ученицы 10 класса к уроку на тему "How much water does a man need?"

How much water does a man need?

Alyoshkina Luda

10 “B”

How much water does a man need? If we look at numbers, we can see that, for example, a Muscovite in 1890 expended per day 11 liters of water. In 1914, he used at about 66 liters, in 1959, water consumption exceeded half a cubic meter.

At the same time, a Londoner needs 250 liters and one Parisian takes 450 liters of water per day. And all this water has to be drinking.

At the same time, the water consumption in homes today is (per person per day) - hand washing without closing the valve, 6.8 liters; brushing your teeth, without closing the tap, 6-8 liters; rinsing toilets -15 liters in one run; Shower -15-20 liters per minute; Wash -130-150 liters at a time; bathing-150 liters, etc.

1 . the old water from the aquarium with fishes can be used for watering flowers at home, it has the necessary elements and mineral fertilizers for plants; 2. waste water in the bathroom (after washing or rinsing) can be used to wash out the toilet; 3. water after rinsing clean dishes may be used for washing floor in the kitchen.