The average typing speed is 38-40 words per minute (wpm) for adults  in a professional working environment (despite many incorrect  reports on the web that it is 50-60 wpm).
Chronic Health Effects The following chronic (long-term) health effects can occur at some time after exposure to Mica and can last for months or years: Cancer Hazard * Some Silicas have been shown to cause cancer in animals. The risk of cancer in humans from Mica is unclear at this time.
But due to the growing awareness that BPA is actually highly toxic, even the FDAâs âsafeâ statement hasnât stopped many plastics and papers manufacturers from replacing the estrogen-mimicking compound with its close cousin, bisphenol S. And the revenue has been worth the change, even if BPS isnât any safer than BPA.