![Natural](https://www.zinc.org/wp-content/uploads/sites/30/2023/03/AdobeStock_179416845-scaled.jpeg)
Water
![](https://www.zinc.org/wp-content/uploads/sites/30/2023/03/Water_Bckg-254x300.png)
Zinc is naturally present. The geology can determine the natural background concentrations of zinc in the overlying water.
Crust
![](https://www.zinc.org/wp-content/uploads/sites/30/2023/03/Ore.png)
Zinc is the 24th most abundant element in the Earth’s crust – for every kg of crust there’s 70 mg of zinc!
Soil
![](https://www.zinc.org/wp-content/uploads/sites/30/2023/03/Natural-300x226.png)
Zinc is naturally present. The geology can determine the natural background concentrations of zinc in the overlying soil.
Plants
![](https://www.zinc.org/wp-content/uploads/sites/30/2023/03/deficiency-300x227.png)
All life on earth is developed in the presence of zinc and it is essential in 100% of living organisms.
Humans
![](https://www.zinc.org/wp-content/uploads/sites/30/2023/03/person.png)
With ~8 billion humans on earth, an average of 2.5 g of zinc per person = 20 thousand tonnes of zinc in living human beings on Earth today.