And, you know, where Drew is right now, it feels like the beginning of a whole new story.

A couple of tipping points really mattered here.

The first was there is a global public health kind of data analysis shop called the Institute for Health Metrics and Evaluations.

And I forget the exact year, but around 2015, they included lead poisoning in an analysis product of theirs called the Global Burden of Disease Analysis.

The Global Burden of Disease basically looks at what killed everyone who died and what was the risk factor that led to that cause of death.

And for the first time, they included lead exposure and started vacuuming up all of the available lead data.

And the numbers were shocking immediately.

Drew, can you boil this down to just one example of a village or even a person or a family that has changed as a result of one of these solutions being applied?

[laughs]

So what can lead be doing in the brains of kids to allow a child to forget what grade they're in? Well, Saim's brain, like all kids' brains, is like a new city under construction.

And calcium actually plays a role like a city planner, directing crews to build synaptic roads and bridges that allow for things like learning and memory and impulse control, all these tools we need.

But when lead is in the body, it masquerades as calcium, and the brain will use the lead instead.

But lead is a terrible city planner, and it directs those crews to build dead-end streets and bridges to nowhere.

And once lead's chaotic network is built, the damage is permanent.

And Saim isn't alone.

[cheering] [applauding]