I heard that batteries can affect soil. I wanted to examine this and started to investigate into this problem. I did experiment: I planted bean into 2 pots- 1st pot: soil without batteries, and 2nd pot: soil was mixed with batteries. After 4 days, plant from 1st pot grew normally and plant from 2nd pot grew not as well as the 1st pot (they were in the same place, conditions, etc.) Can anyone explain me how batteries affect soil? I must present this experiment in 2 days as my chemistry project.