¹ How do we make clean water?
So necessary for life.
We can boil it, is one way
For your children and your wife

² But that usually eats up energy
To cook a lot of it.
But that don’t have to happen
If you recycle heat to do it

³ Two long pipes with one inside
Called a “counter-flow exchanger”
Heats input water to boil it
By cooling the output out of danger

⁴ Thus it takes less energy
To boil a lot of it
And make it safe for all of us
For drinking make it fit

⁵ Then there is a 2nd way
Get water from the sea
By distilling at room temperature
Make it fit for you and me

⁶ A “column still” is often used
In the petroleum industry
To separate its inputs, or
Clean water from the sea

⁷ A 40 foot long PVC
Going straight up in the sky
Like in a mercury barometer
Water only goes so high

⁸ Above that water, vapor is
Just remove it without fault
Then condense it in a different pipe
It’s distilled without the salt

⁹ The best thing is, it does its job
At room temperature’s degree
So you get clean water out of it
Without any other debris

¹⁰ It takes so little energy
As water flows downhill
Or uses solar energy
So you never get a bill

¹¹ There are many was it's done
But, if you do it up just right
Save heat from daytime sunshine,
      so
It cleans water day and night

¹² It always makes clean water
Just like the flying clouds
Takes water from the ocean, to
Water flowers and the crowds

Neat huh!