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A good way to grasp huge numbers on a national or global level is to see what they are per person.

In this case, 1.9 billion tonnes per 7 billion people is about 270kg (600 lb) per human

Honestly, that doesn’t seem like that much. That’s only ~13 large plates at the gym.

Unfortunately I can't grasp the number of humans either.

The cool part is that the ungraspable numbers cancel each other out, and you're left with a human scale number.

I think you could understand that that value is only useful in some contexts.

It’s like comparing apples and oranges.

You can grasp 270kg/600lb, though, right?

Think of it as “a car every four years for every person”.

Or the same weight of "tin" cans.