Through their roots, many plants leak chemical compounds into the soil. Thus, there is issues that transgenic plants may leak different compounds than conventional plants do, as an unintended consequence of their changed DNA. This leads to concern whether the communities of micro-organisms living near transgenic plants may be affected. This  interaction can be categorised as complex, because micro-organisms that live around plant roots also leaking chemical compounds into the soil. However, lack of scientific knowledge hindered the Attempts to discover whether transgenic plants are changing the soil environment, and whether they are changing it in good ways or bad ways.