Answer:
The most critical policy issue facing America today is the rivalry between Democrats and Republicans, Antifa and Trump supporters, left and right, progressives and conservatives; in short, the inherent social conflict in American society today, which is creating a series of increasingly serious social confrontations among the nation's citizens. Clear examples of this situation are the assassination of George Floyd, the assault on the Capitol by Trump's followers, the constant excesses of Antifa in his mobilizations, and the growing tension between both political groups.
Unfortunately, our government is not taking the necessary measures to unite the nation, but rather each political party operates according to its own interests, increasing the severity of the problem more and more.
The answer is corrosive health hazard.
You would need to be more specific in what the value 'over 100 dB' is
