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.
A mold becomes toxic when it multiplies and sends dangerous mycotoxins into the air. The most toxic and dangerous molds for humans are stachybotrys (black mold), penicillium and aspergillus. Toxic molds have been linked to memory problems, brain damage, cancer of the kidneys, esophagus and liver, and leukemia.