7. Associated risks and monitoring
CO 2 occurs naturally in the atmosphere. Its volume content in homes and workplaces generally varies from 0.04 to 0.06%. Occupational exposure limit values are 5,000 ppm by volume (0.5%) at 8 h per day and 40 h per week .
Existing geological reservoirs have demonstrated their ability to hold gas and oil for millions of years. It is not uncommon for these reservoirs to contain CO 2 . Natural CO 2 deposits exist (example of Montmiral in the Drôme). This shows that underground reservoirs can be watertight...
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Associated risks and monitoring
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