How one time you taught about carbon dioxide by making grape soda in class.

Tropical rainforests produce oxygen and consume carbon dioxide.

We refer in big history to these moments as threshold moments.

Air quality normal, no oxygen needed.

This minus 1, 2, 5, and 4.

Inert nitrogen, high concentration of carbon dioxide crystals, methane...

You can't live without oxygen.

Climate change, ocean acidification, dissolved oxygen, carbon cycle, coastal upwelling, fishing dynamics the full spectrum of earth science and ocean science simultaneously in the same volume.

If you fracture it, you can look at the fact that it's nanostructured.

The baby was delivered through a C section, but Barbara suffered cerebral anoxia, a loss of oxygen to the brain.

let's look at the lecture based classroom, and let's pick the median performance as a threshold.

(Laughter)

And I'm just showing this to you again because it's so nice.

From set A to set B.

A universe appears, an entire universe.

A very simple example is this When the world was primarily plants, the environment, which had carbon dioxide and some oxygen in it when they first started,

That's all it tells us.

This is the range right here.

My next step's gotta be oxygen.

When the ocean absorbs a lot of CO₂, the water becomes more acidic.

It's possible because the mycelium produces oxalic acids, and many other acids and enzymes, pockmarking rock and grabbing calcium and other minerals and forming calcium oxalates.

What's a drug?

There are three basic limitations of scuba diving.

This isn't Volvos this is volcanoes.

So why is this relevant? Because when you put animals and plants in the same environment,

People say, What's the solution? Here it is.

Or large scale fluctuations lifting the small ones even further.

That's what we use to inject, as we start to do our deep dives.

We need to breathe.

We had explosions because the kit was designed and installed by people who weren't used to it.

These granules contain three essential plant nutrients.

This was a different record.

Stop laughing. You used up all your oxygen, dummy.

That might maybe look like this, and if you now threshold this hypothesis at 0.5, you end up with a threshold that's around here so that everything to the right of this point you predict as positive, and everything to the left of that point you predict as negative.

Too hot, too hot.

Remember q came from our HTML.

Well, in the context of diving, you get too much, you die also.

We're making strings that are too big.

Meanwhile, the human body consists of 65 oxygen, 18 carbon, 10 hydrogen, and 7 of various other elements including 0.002 of silicon.

We stopped tilling, so that we could prevent greenhouse gasses from going into the air.

It appeared dead.

High oxygen content.

Oxygen! Yes!

Pure oxygen.

Oxygen, yes. Thermal garments...