it mad the soil become salty making it hard for crops to grow
Steelmaking is the process of producing steel from iron ore and/or scrap. ... Limiting dissolved gases such as nitrogen and oxygen and entrained impurities (termed "inclusions") in the steel is also important to ensure the quality of the products cast from the liquid steel.
To make it less expensive to conduct trade between countries
Explanation:
in Taiwan it is believe that spitting bones on the floor is cleaner than putting them on the plate
622 is the year when the Islamic calendar begins. It is the year of Hijrah from Makkah to Medina.
According to the Islamic calendar Mehammad returned to Makkah in 8 AH ( Anno Hegirae ) or in 629 ( Christian calendar ).
Muhammad died in 11 AH ( or 632 ).