America is so widely spaced out that there are some huge stretches of mostly empty highways, so the only feasible way to monitor for speeders is by helicopter watching over the massive stretches of road. Or at least that's how it used to be, these days i bet they are increasingly just using cameras
That's so odd, i thought usually sports car speedometers go higher than the car is actually able to achieve in order to trick people into thinking it's actually capable of going that fast. But now that i think about it i guess that was just an assumption
It'll be in the air too. Anything in the soil will become dust in the air for years. It'll get kicked into the air every time a lawn is mowed, a hole gets dug, a dry season occurs, etc
And OP's comparison pic is nonsense for more reasons than that. The time ranges are wildly different, it's counting starting from 1776 for the US, but it starts counting from 1949 for the PRC
A million dollars buys a lot of food and shelter which gives you more time to do mushroom picking. And the process of accepting the prize probably wouldn't have taken more than a couple of days
News Flash: Cause and effect exists. People don't pop into existence each day as a brand new slate unaffected by their past.
There may or may not be value to the study, but this pop-sci article is trying to make a mountain out of a molehill.