Write down a few words
describing this scene
What do you think?
From Science Concept Cartoons Set 2 – Millgate House Education
Why did NASA send Mars Rover
to find clues of water?
Water signifies life
Earth is the only planet we know that has water and
without it life on Earth could not have evolved.
Where do you use water?
If a person in the UK had to carry home all their water in
2 litre bottles, on average, how many would they need
each day?
4 bottles
20 bottles
75 bottles
90 bottles
On average a person in the UK uses
150 litres of water = 75 two-litre bottles
So how many do you think would an
average person use in the USA?
On average a person in the USA uses
575 Litres of water = 287.5 two-litre bottles
So how many do you think an
average person in Italy would use?
On average a person in Italy uses
386 litres of water = 193 two-litre bottles
So how many do you think an
average person in Bangladesh would
use?
On average a person in Bangladesh uses
46 litres of water = 23 two-litre bottles
So how many do you think an
average person in Ethiopia would
use?
On average a person in Ethiopia uses
15 litres of water = 7.5 two-litre bottles
So how many do you think would an
average person use in Mozambique?
On average a person in Mozambique uses
4 litres of water = 2 two-litre bottles
The World Health Organisation say
that about 20 litres per person per
day is essential for a decent life.
On average women
in Africa and Asia walk
nearly 4 KMs to
collect water
Over 1 billion
people in the world
DO NOT have
access to clean water
https://www.youtube.com/watch?v=mVTahkpVabw
Over 2 million
people die each year
from a waterborne
disease
https://www.youtube.com/watch?v=mVTahkpVabw
We all need water that is
clean and safe to drink.
What makes water unsafe?
What makes water unsafe?
Rubbish in the sea
Oil leaks from ships
Dirt
Untreated sewage
CONTAMINANTS
pesticides
cadmium
copper
oil
mercury
lead
zinc
How can we make water clean and
safe?
Build a filter!
Activity
• Every team should have a ‘Country Sheet’ and ‘Cost’ sheet.
• Read the information for your country.
• Within your groups:
Plan and design your filter
Complete the ‘Cost sheet’ and nominate 1 member to
buy goods from the shop
Nominate 2 members to test and present the filter
Material
Unit Cost
2 litre bottle
10 credits
Straws
2 credits each
Rubber Band
2 credits each
Activated charcoal
30 credits per 1/4 cup
Cheesecloth
4 credits/square
Cotton wool
2 credits/ball
Gravel - coarse
5 credits/cup
Gravel - fine
5 credits/cup
Sugar
5 credits per cup
Toilet paper
1 credit per sheet
Sand- coarse
10 credits/cup
Sand - fine
15 credits/cup
A4 paper
2 credits per sheet
Information sheets
Fully Labelled Diagram
100 credits
Unlabelled diagram
50 credits
Full instructions (Available if your country has a
literacy rate of over 90%)
40 credits
Partial Instructions
20 credits
Well done!
The availability, supply and treatment of water is different
around the world but by using our knowledge and skills
we can ensure this vital resource is made available to all.
‘Everyone has the right to access the technologies
that are essential to life.’
I am an MDG child...
https://www.youtube.com/watch?v=Sj6q0Apd_cs
What can you do?
Use less water at home
Turn off the tap while
brushing your teeth
Take showers
instead of baths
Use only what you need
when making a cup of tea
Wash fruits and vegetables
in a bowl of water
What can others do?
Recycle water
Greywater is the waste water
from baths and showers. It can
be used to to flush toilets or
to water the garden
Sewage water (from toilets)
can be treated to remove
impurities and also used to
water the garden.
Water for the World!
Most
important
Find out more ways in which you can
save water
Tell your friends
and family about
what you have
learnt today
Find out more about
Technology Justice…and
spread the word
Avoid
wasting
water
This presentation was made
by EWB-UK
Thank you!