All consume pollutants and would survive an oil

All over the world in nature there are several microbes that are meant to degrade and digest polluants. Scientist use bioremediation which is the use of microbes to help solve environmental issues like pollutants in the soil or groundwater (1). ┬áScientists are studying different bacteria that will move through porous material to help clean up oil spills and such from sand and mud along the coastlines because current techniques (e.i., incineration or digging up soil and landfilling of the polluted material) are harmful and disturbing to lands. Bioremediation takes the microbes that consume pollutants and would survive an oil spill or other environmental contaminants; and provide them with fertilization, oxygen, and the conditions they need to reproduce rapidly (2). By providing these factors and encouraging rapid growth the microbes can breakdown the pollutants faster helping with clean; this is a process called biostimulation (3). An example of when microbes assisted in an oil clean up in an offshore oil well explosion was in 2010 in the Gulf of Mexico. After approximately 2 to 6 days the microbes present in the area had already degraded about half of the oil released from the BP Deepwater Horizon. Oceanospirillum or Colwellia were two of the microbes proven to be present during the rapid biodegradation of the oil (3). In new news it has been found that the addition of carbon is needed for certain microbes to remediate the soil and groundwater in Finland that is contaminated with a pesticide called atrazine. Although, the discontinuation of using the pesticide was over 25 years ago its still being found predominantly in groundwater. The pesticide has been found to be an endorphin disruptor. It was discovered that by introducing increased amounts of carbon to Finland’s soil that is carbon poor, it assisted in degrading low concentrations of atrazine (4). Bioremediation methods are needed for cost effective reasons. For example it can be costly for the incineration or landfilling of polluted materials. Also it is safer than having to dig up or pump out large amounts of pollutants from the water, soil, or sediment (1). Bioremediation seems hands down the best and easiest way to clean up pollutants in the worlds soil and groundwater. Is there anyway that it is harmful to humans or animals? Can the number of microbes grown due to biostimulation become harmful if too many are produced and if so is there a way to decreased the microbes after the clean up is completed?