It seems the ammonium nitrate may actually have come on a ship that made an unscheduled stop at the Beirut port in 2013 because of technical difficulties.
Leftover chemicals developed for war such as ammonium nitrate for munitions and organophosphates for nerve gas became fertilizers and pesticides on the farm.
Primary investigations into the blast revealed that the ammonium nitrate stored since 2014 in a warehouse at the port caused the explosions, which killed over 200 people and injured more than 6,000 others.