1. US Department of Commerce N.Global monitoring laboratory‐carbon cycle greenhouse gases.2020.https://www.esrl.noaa.gov/gmd/ccgg/trends/mlo.html. Accessed July 1 2021.
2. Technical rules for hazardous substances (TRGS 900).Federal Institute for Occupational Safety and Health (BAuA).2006.https://www.baua.de/DE/Angebote/Rechtstexte‐und‐Technische‐Regeln/Regelwerk/TRGS/pdf/TRGS‐900.pdf?__blob=publicationFile
3. Personal communication with and Dr. Hans‐Peter Fröhlich German Social Accident Insurance Institution for the Trade and Logistics Industry (BGHW) and Wolfram Neumann German Social Accident Insurance Institution for Commercial Transport Postal Logistics and Telecommunication (BG Verkehr) at the G2 Seminar (20.‐21.02.2019). IFA Sankt Augustin Germany.
4. Exposure assessment of potash miners at elevated CO2 levels