While the Earth has a constant amount of water that cycles through the system, there are several reasons we must still save water. First, not all water is accessible - most is saltwater and some freshwater is locked up in ice or flows underground. Additionally, the world's population is growing and polluting more water, reducing the amount available for human use to only 1% of total freshwater. Proper conservation techniques like turning off taps when not in use can save substantial amounts of water on a daily basis.

1. IF THE EARTH HAS ALWAYS THE
SAME AMOUNT OF WATER, AND IT
ALWAYS FOLLOWS THE SAME CYCLE,
WHY MUST WE SAVE OUR WATER?
Joel Sarola
Jenabu Sumareh
Roger Planella
Paula Solà

2. WE HAVE TO SAVE IT BECAUSE...
• We have done an experiment, and we have
seen that the water can underground flow.
Here we can see the difference.

3. A FORM TO WASTE IT
• If you don’t close the tap of the water, you are
wasting it. We have done another experiment
and we have seen that in Catalonia we can
waste 1.892.750 of litres in a day, if we let
running the water.

4. THE ANSWER
• We have to save the water ( althouhg
we have got always the same),
because...

5. 1- The distribution of the water. There
is a lot of saltwater, a 97% of it. We
only have got a 3% of freshwater.

6. 2- But from the 3% of the
frehwater, there is some ice that we
can’t use. There is also some
underground flow. We can’t use this
water, so we can only use the 1% of the
freshwater.

7. 3- The pullation is another way that
know that we have to save the water,
because we can’t use the polluted
water. So, a lot of countries have got a
Depurator to clean the water.