Serious heavy metal poisoning can occur.
Arsenic, lead, cadmium, chromium and mercury are the five heavy metals that have the greatest impact on the environment. They contain three of them in the battery. They are lead in lead storage batteries, cadmium in nickel-cadmium batteries, and alkaline zinc-manganese batteries. Mercury present as an additive. Therefore, throwing the above batteries does cause great harm to the environment.
If people eat food grown with contaminated soil or drink contaminated water, serious heavy metal poisoning will occur. A rotten first battery, the heavy metal can make one square meter of soil lose planting capacity, and a rotten button battery will pollute 600,000 liters of water.