Windswept copper in Rouyn-Noranda, lead falling from the Pierre-Laporte bridge, arsenic released by the Horne smelter. These events are not all created equal when it comes to health (and safety).
Arsenic, copper and lead are part of what are mistakenly called heavy metals. Arsenic is a metalloid and copper is three times lighter than gold. All three elements have toxic properties, but to very different degrees. Let’s compare them in the form of powder (or dust) in the air using the CNESST directory and the Workplace Hazardous Materials Information System.
Let’s immediately settle the case of the least bad of the three: copper. Powdered metal can cause eye inflammation and upper respiratory tract irritation. It is recommended to store it in an airtight container.
Then let’s move on to the worst: arsenic. This metalloid used in foundries for refining copper can cause irritation to the skin, eyes and respiratory tract. Its carcinogenic effect has been demonstrated in humans. An excess of cases of lung cancer has been observed among cross-country skiers.
Between these two extremes, let’s place lead. Exposure to this metal can occur during renovations where lead paint was used. It induces anemia, increases blood pressure, exerts an action on the nervous system and has a detrimental effect on sperm.
All things considered, how is it that copper, so valuable for making electrical components, is being pushed around by the wind? Why is the Department of the Environment tempted to fine the Horne smelter for this low-toxic copper when its government lets it release carcinogenic arsenic? As for the contractor who interrupted work on the Pierre-Laporte bridge in the presence of lead, prevention prevailed.
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