Environmental pollution is a serious problem as the soil and the water have been contaminated. The contamination of soil and water with pollution caused by environmental pollution has become the biggest menace to the health of humans and animals. Traditional methods of cleanup are very costly, and at the same time, they may cause a lot of damage to the environment. The implementations of bioremediation and phytoremediation strategies as sustainable and cheaper options to facilitate the employment of natural biological processes for the detoxification of the polluted environment. Bioremediation is a process that makes use of microorganisms to get rid of the pollutants, while phytoremediation is a process which makes use of the plants and the microbes that cohabit with these plants in order to clean or neutralize the contaminants. This paper follows up on the project case studies of the successful usage of green technologies when applied to the cleaning of organic pollutants, heavy metals, petroleum hydrocarbons. Also, it is a detailed survey of both in situ and ex situ bioremediation methods, for example, bioventing, biosparging, and bioaugmentation as well as those phytoremediation processes like phytovolatilization, phytoextraction, and phytodegradation. The article provides bioremediation and phytoremediation case study example of application in different environments, such as oil-contaminated soils, industrial sites, and those areas which are affected by heavy metal pollution. After thoroughly going through these charts, it is quite evident that the green technology field is quite reopening the doors for the complete and effective decontamination of polluted ecosystems.