[MagI (OP)]

2000 years ago Caesar said "also you Brutus" when he was stabbed to death in Rom by his senat.
The number of gas atoms he released is so enormus  that at least on atom from his breath that time, are in every intake of air we take today.

As of 1993, worldwide, 520 atmospheric nuclear explosions (including 8 underwater) have been conducted and Fukushima, Three Mile Island, Chernobyl has exploded releasing active
atomic  nucleuses all over the world.

Since 1945  cancer have been growing rapidly world wide.
https://jonbarron.org/article/growth-cancer [nofollow]

In hundred years I guess every breath we take and every glas of whater we drink will contain at least some active hazard nucleuses and if they decay and release its energy its like having a gun in your body going off.

What do you people think about this ?

Regards

Master of Science in Engineering Physics

[evan_au]

Your body contains numerous radioactive nuclei. The quantity of these doesn't matter - what matters is how many of them break down when they are in/near your body.
- 0.01% of the Potassium in your body is radioactive K40; but the half-life is a billion years, so it doesn't create much of a radioactive burden.
- Radon gas in your basement has a very short half-life, so there is a significant chance it will decay when you inhale. This leaves solid radioactive atoms deep in your lungs.
- It is possible to calculate the total radiation dose for people today - provided you didn't live anywhere near Chernobyl, Fukishima, and don't travel in jet planes too often, your total radiation dose is not too different from 100 years ago
- Only we don't take Radium salts as a health elixir any more!
- So overall, your risk of cancer from radiation hasn't changed much.

What has changed significantly in the past century is that average life expectancy has grown - and cancer is mainly a disease of the old.

Your average human cell suffers about 50,000-100,000 mutations per day from natural causes (including natural radiation and damage from normal cellular metabolism). Most mutations are repaired, but the errors build up over a lifetime, increasing the chance that a cell line will become cancerous.
See: https://en.wikipedia.org/wiki/DNA_damage_(naturally_occurring)#Frequencies

[Bored chemist]

For most people the increase in radiation exposure  since"pre-industrial" times is largely due to two factors- international air travel (at high altitude the thin air can't shield us from the radiation from the sun)- and medical exposure- essentially Xrays etc.

I'm prepared to put up with those.