Biotechnology has emerged as a transformative discipline that bridges biological sciences with engineering and technology to develop sustainable solutions for complex environmental problems. With the rapid industrialization, urbanization, and expansion of human activities, the environment has come under unprecedented stress in the form of pollution, resource depletion, and ecosystem degradation. Traditional methods of environmental management, such as chemical treatments and physical removal of pollutants, often create secondary problems like high energy demand or secondary pollution. In contrast, biotechnology provides eco-friendly, cost-effective, and sustainable alternatives that make use of microorganisms, plants, and their derived enzymes for the restoration, conservation, and monitoring of the environment. Environmental biotechnology, therefore, plays a crucial role in managing natural resources, treating waste, monitoring pollution levels, and generating renewable energy. One of the most significant applications of biotechnology in environmental management is bioremediation. Bioremediation uses microorganisms or their enzymes to degrade, detoxify, or transform pollutants into less harmful forms. Hydrocarbons, heavy metals, pesticides, and industrial effluents are some of the key pollutants that can be addressed through bioremediation. For example, oil spills in marine ecosystems can be treated by hydrocarbon-degrading bacteria, which break down the oil into simpler compounds that do not harm aquatic organisms. Similarly, bacteria like *Pseudomonas*, *Alcaligenes*, and *Sphingomonas* are employed for degrading xenobiotics that are otherwise resistant to natural degradation. Bioremediation can be carried out in situ, directly at the contaminated site, or ex situ, by excavating the contaminated material and treating it in a controlled environment. This technology has been applied to restore polluted soils, rivers, and industrial lands, thereby reducing long-term ecological risks. Another crucial biotechnological approach in environmental management is phytoremediation, which uses plants to absorb, concentrate, and detoxify pollutants from soil and water. Certain plants have the natural ability to hyperaccumulate heavy metals such as lead, cadmium, and arsenic. These plants, known as hyperaccumulators, can be cultivated on contaminated land to extract toxic metals that are later removed with the harvested biomass. For instance, *Brassica juncea* (Indian mustard) is often used for removing lead and cadmium from soils. Phytoremediation is highly valued because it is cost-effective, aesthetically pleasing, and environmentally sound, though it may take longer compared to microbial remediation. Biotechnology has also been applied extensively in waste management. Solid waste and municipal waste disposal pose significant threats to public health and the environment. Through composting and vermicomposting, organic wastes are biologically converted into nutrient-rich manure that can be used to enhance soil fertility. Microorganisms such as *Trichoderma*, *Aspergillus*, and *Bacillus* are commonly used to accelerate the decomposition process. Similarly, microbial consortia are employed in sewage treatment plants for breaking down organic pollutants, reducing biological oxygen demand (BOD), and improving water quality before the effluents are released into natural water bodies. Constructed wetlands that utilize microbial communities and aquatic plants are also being increasingly adopted as natural sewage