Life itself is toxic --- no one is going to get out alive.
You mention any number of substances; some are, of course, very deadly. But others, copper and lead, for example, are far more dangerous when combined with other elements to form toxic salts.
And some of these, radon, for example, are generated through natural processes.
I have no qarrel with those who seek to identify and control the use of truly dangerous substances, but too much of the alarm is grounded in ignorance, and nurtured by those latter-day Puritans who still believe that further governmental interference will alleviate the problem.
Environmental bureaucrats have absolutely zero interst in solving a problem, for that would put them out of "work". They have to identify a larger "problem" to justify more interference, and a larger staff and salary we are all expected to pay for.
Additional progress in identifying health hazards will be made, through the natural interplay of free chices in the marketplace, and in the theater of human opinion. But as demonstrated by the battle over smoking, progress will be slow, and the effect of state participation minimal.