Not enough breath to expand the atmosphere

So I was lying in bed last night, trying not to cough, when a question entered my mind...

If all living creatures...the ones who breath oxygen in and out, exhaled at exactly the same moment...would our atmosphere expand? Even a little bit, like a balloon?

How could we know if it did? Maybe it does all the time and I just don't realize it. After all, the only choices we have are to either breath in or breath out. What are the percentages at any given moment that life is inhaling or exhaling? The number would change every second...with every breath. I wonder what the average percentage would be?
Is it an even balance like 50% of all life forms just exhaled while the other half just inhaled? Or is it more like 23% breathed in and 77% breathed out. If that is so then the opposite would happen in the next second with 77% inhaling and 23% exhaling. Of course that assumes that each person (or life form) will breath at exactly the same speed in the very next moment. So that would never happen.

Sometimes my breathes are quick and sometimes they are slow. Did I just throw off some number some where that calculates the balance at which oxygen and carbon dioxide is generated? How many people are doing this and throwing off the number? The number would change, even in the second it would take to calculate it. It's a number that could never BE calculated.

And just how do trees breath? Through their leaves. They do the same as us, only in reverse, right?
Well then why don't they have lungs? Because they don't need to circulate energy to their legs and arms...they don't need to move, they don't have muscles.

Back to the main topic.
Air.
It takes up space. It doesn't matter what kind of air it is...oxygen, carbon dioxide, hazardous lethal gas...it all takes up space.
Our universe is filled with it.
Our universe IS it.

The concepts intrigue my wonder. I would be a chemist...if I didn't hate math so much.

I think God knows the numbers. He knows them all. I'd ask him, if I thought my brain could handle the info. But what would it matter anyway? It would just be a bunch of jumbled jargen that I would only be interest in for about an hour. After that I wouldn't care. Unless of course, the numbers were about to change the world....then I'd wonder...is that what causes weather? Our breathing patterns? Is the fact that our planet is creating more breathing people actually having an effect on the strength of a hurricane in the Forida panhandle?

We call it a natural disaster, but I wonder...

Is our own life causing our own death?

Just my thoughts for now...
:-)