What Lies Beneath

Tell me, where are you getting your information? From TV? From your coworkers.  What EXACTLY do you mean by this statement?

i just want to say, we humans had done alot bad thing to nature and earth. we should stop it.

it's common knowledge that Hiroshima is still bathed in radiation after 60+ years of time, it'll be millions of years before the Nuclear activity calms down enough to be fine

if enough nukes were fired to bathe the world in radiation then the nuclear particles will scatter into the atmosphere and fall down evenly on earth

and I make assumptions, tbh I have no idea whether this will happen, I just study the Cold War at school and play Fallout 3 at home

Not true, look at Chernobyl. A haven for wildlife because their life spans are not long enough for the radiation to cause serious harm.