In today's time, as technology has developed, the spread of pollution in the environment is also increasing. Some heavy metals like Zn, Pb, Cd, Ni, Cu, and Cd are entered into the soil through chemical factories and mining and these types of heavy metals are responsible for decreasing the fertility rate of the soil.

When humans eat the crops grown on such land, these heavy metals enter the human body and after a long period, they produce disease. Currently, there are many ways to extract such heavy metals but they are expensive.