Different slopes.
On top you kill one person per whole number increment. 0 -> 1 kills one person
On bottom you kill infinity people per whole number increment. 0 -> 1 kills infinity people
You can basically think of it like the entirety of the top rail happens for each step of the bottom rail.
It’s still inert.
Inert simply means that the chemical bonds are relatively stable, not that they’re indestructible.
You can decompose anything if you get it hot enough.