Why the Movement of Electrons Connect Soil, Plants, Microbes and Every Living Thing on Earth
If I asked you one simple question...
What powers a garden?
What would your answer be?
Most people would probably say:
The sun.
Rain.
Healthy soil.
Nutrients.
Compost.
Microbes.
And they'd all be partly right.
But none of those answers reaches the deepest level.
Because beneath every root...
Every fungus...
Every earthworm...
Every leaf...
Every compost pile...
Every forest...
Every coral reef...
Every breath you take...
Every heartbeat...
Something invisible is happening.
Electrons are moving.
Without that movement...
Life stops.
The movement of those electrons has a name.
Redox.
Understanding redox doesn't simply teach us another piece of chemistry.
It changes the way we see life itself.
We've been talking about redox this entire time
Whether you realised it or not...
Every article you've read so far has been preparing you for this one.
When we explored carbon cycling...
We were talking about energy moving.
When we explored nitrogen cycling...
We were talking about energy moving.
When we explored roots...
We were talking about energy moving.
When we explored biodiversity...
We were talking about energy moving through countless living relationships.
When we explored pH...
We discovered that chemistry is constantly changing because living organisms are constantly changing it.
Every one of those stories points towards the same invisible principle.
Life isn't static.
Life is movement.
And one of the most fundamental movements in nature is the movement of electrons.
That movement is called redox.
Life isn't made of objects.
It's made of relationships.
When we first begin gardening, it's natural to see everything as separate.
A tomato plant.
A handful of compost.
A worm.
A rock.
A bag of fertiliser.
A watering can.
Nature doesn't see those things as separate.
A tomato becomes compost.
Compost feeds microbes.
Microbes release nutrients.
Roots absorb nutrients.
Roots feed fungi.
Fungi transport minerals.
Leaves capture sunlight.
The plant grows.
The cycle begins again.
Nothing exists alone.
Everything is participating in an endless exchange of matter, energy and information.
Redox is one of the ways we describe that exchange.
So... what actually is redox?
The word redox comes from two chemical processes.
Reduction
and
Oxidation.
Those words often scare people.
They shouldn't.
At their simplest...
Oxidation means losing electrons.
Reduction means gaining electrons.
That's it.
Every redox reaction is simply an exchange.
One substance gives electrons away.
Another substance receives them.
Nature is constantly passing electrons from one place to another.
Every second.
Everywhere.
Those tiny exchanges are what allow life to store energy...
Release energy...
Move energy...
And transform matter.
Fire is redox you can see
Imagine lighting a campfire.
The wood burns.
Heat pours into the air.
Light fills the darkness.
Smoke rises.
Ash remains.
We often think the fire is simply "burning."
But something much deeper is happening.
The carbon-rich compounds inside the wood are giving electrons away.
Oxygen is accepting those electrons.
The wood is being oxidised.
The oxygen is being reduced.
As those electrons move...
Energy is released.
We experience that energy as heat and light.
Fire is simply a very rapid redox reaction.
It's one of the few times we can actually watch electron movement revealing itself.
Your body burns too...
Just much more slowly.
Every time you eat...
You're taking in molecules that contain stored energy.
Mostly carbon-rich molecules built by plants.
Every time you breathe...
You bring oxygen into your lungs.
Inside almost every cell in your body...
Those food molecules slowly give up their electrons.
Oxygen accepts them.
Instead of releasing all the energy at once like a campfire...
Your cells capture that energy gradually.
Carefully.
Efficiently.
The result powers:
- your heartbeat;
- your muscles;
- your brain;
- your immune system;
- your nervous system;
- tissue repair;
- growth;
- memory;
- and every other process that keeps you alive.
Cellular respiration is often described as controlled combustion.
That's a useful comparison.
Both involve redox.
One burns in seconds.
The other burns quietly for decades.
ATP: Life's energy currency
This raises another question.
If food contains energy...
How does a cell actually use it?
The answer is a remarkable little molecule called ATP—adenosine triphosphate.
ATP is often called the energy currency of life.
Not because it stores enormous amounts of energy.
But because it transfers small amounts of usable energy incredibly efficiently.
Every time a muscle contracts...
ATP is involved.
Every time a root grows...
ATP is involved.
Every time a cell divides...
ATP is involved.
Every time a protein is built...
ATP is involved.
Every living cell on Earth is constantly making ATP...
And constantly spending it.
Your body doesn't simply carry around a lifetime supply.
It continually recycles ATP every second of your life.
Without that constant regeneration...
Life would stop within moments.
So where does ATP come from?
From redox.
Not directly...
But through one of biology's most elegant energy-conversion systems.
The mitochondria: Tiny power stations inside every cell
Inside almost every one of your cells are tiny structures called mitochondria.
You may have heard them described as:
"The powerhouse of the cell."
That's true.
But it doesn't really explain why.
A better description might be this:
Mitochondria are the cell's energy-harvesting engines.
Food arrives carrying high-energy electrons.
Inside the mitochondria...
Those electrons are passed from one molecule to the next through an extraordinary sequence of proteins known as the electron transport chain.
Notice that name.
Electron.
Transport.
Chain.
It's exactly what it sounds like.
A carefully organised pathway that moves electrons step by step.
Each tiny transfer releases a little energy.
Instead of wasting that energy as heat...
The mitochondria use it to pump hydrogen ions across a membrane, creating an electrochemical gradient—rather like storing water behind a dam.
When those hydrogen ions flow back through a remarkable enzyme called ATP synthase, the stored energy is used to build ATP.
The cell has converted the movement of electrons into usable biological energy.
No electron flow...
No hydrogen gradient.
No ATP.
No life.
(To be continued in Part 2: Plants perform the opposite miracle — Photosynthesis, chloroplasts, stored sunlight, and why every garden is really a solar-powered energy system.)