Yeah, it literally took years before we can reach this conclusion, even if the conclusion is absolutely reliable. (We still need to observe like 50 more years,

Yeah, it literally took years before we can reach this conclusion, even if the conclusion is absolutely reliable. (We still need to observe like 50 more years, haha.) That's the current limitation of our technology. If we could measure radiation levels in a large scale with high resolution within, say, few hrs/days, maybe we didn't have to evacuate all those people. We can't, so we should.