Metagenomics is the study of genetic material recuperated directly from environmental samples. The broad field may likewise be alluded to as ecological genomics, ecogenomics or community genomics. While traditional microbiology and microbial genome sequencing and genomics depend upon developed clonal cultures, early environmental gene sequencing cloned specific genes to deliver a profile of decent variety in a characteristic example. Such work uncovered that most by far of microbial biodiversity had been missed by development-based strategies. By characterizing the abundances of genes having a place with these genera, metagenomic sequencing revealed the varieties of microbial wealth and decent variety under various natural conditions. All capacities associated with these microbes added to the tolerance of microorganisms to heavy metals.