Contact Careers Group Your Omya Solutions The Carbonate Cycle Natural calcium carbonate deposits may appear massive and immobile, but they do in fact undergo gradual change. Within this system, atmospheric influences alone drive the cyclic processes. Water evaporates and is transformed into gas or water vapor that is carried away by the wind and returns to the earth's surface as rain. Fine droplets of water (e.g. rain) make effective absorbers of atmospheric impurities like CO2, SO2 and NOx, which dissolve to form acids. This "acid rain" attacks limestone and decomposes it. Calcium bicarbonate is water-soluble, meaning it is washed away into the oceans. This chemical process supplements the mechanical erosion of hills and mountains by wind and water, and is a principal cause of the increasing salinity in the world's oceans. In the oceans, changes in temperature, pressure, pH, CO2 content etc. may reverse the reaction, causing the carbonate to precipitate and gradually form new sedimentary rocks on the ocean floor. Your Omya Advantages R & D Interdisciplinary Research Performance & Efficiency Services & Support Technical Services & Innovation Technical Services Innovation and Application Development Production Secured Raw Material Supply State-of-the-Art-Facilities ISO Certified Quality Control Supply Chain Procurement Logistics Customer Service Specialty Chemicals Distribution Customized Distribution Offer Local Knowledge - Global Understanding Relationships Company History Guiding Principles Sustainability Ground Calcium Carbonate Precipitated Calcium Carbonate Dolomite Your Omya Solutions Paper & Board Construction Polymers Environmental Solutions Consumer Goods Contact Impressum Terms and Conditions Data Protection Notice Copyright Omya AG 2020

Contact Careers Group Your Omya Solutions Regulatory Affairs Omya closely monitors regulatory affairs on a global basis. In Europe, Omya is an active member of the European Calcium Carbonates Association (CCA-Europe), the European Industrial Minerals Association (IMA-Europe) and is an affiliate of the European Chemical Industry Council (CEFIC). It has also established close relations with the representative European associations of the paper industries (CEPI), the plastics producers (PlasticsEurope), the paint and coatings industries (CEPE) and the chemical distributors (FECC). Your Omya Advantages R & D Interdisciplinary Research Performance & Efficiency Services & Support Technical Services & Innovation Technical Services Innovation and Application Development Production Secured Raw Material Supply State-of-the-Art-Facilities ISO Certified Quality Control Supply Chain Procurement Logistics Customer Service Specialty Chemicals Distribution Customized Distribution Offer Local Knowledge - Global Understanding Relationships Company History Guiding Principles Sustainability Ground Calcium Carbonate Precipitated Calcium Carbonate Dolomite Your Omya Solutions Paper & Board Construction Polymers Environmental Solutions Consumer Goods Contact Impressum Terms and Conditions Data Protection Notice Copyright Omya AG 2020