Discuss the applications of biotechnology in environmental management. Write short notes on biomonitoring and biomethanation.

Biotechnology plays a vital role in addressing and mitigating environmental problems, offering sustainable solutions for pollution control, resource management, and ecosystem preservation. Environmental biotechnology is a specialized branch that applies biotechnological principles to maintain and restore the quality of the environment. This field integrates molecular biology, microbiology, biochemistry, and chemical engineering to devise eco-friendly technologies for environmental management.

One of the main applications of biotechnology in environmental management is in waste treatment and pollution control. Biological systems such as bacteria, fungi, and plants are used to degrade, detoxify, or accumulate pollutants from industrial effluents, domestic sewage, and hazardous wastes. Bioremediation is a prime example of this application. It uses living organisms to clean up oil spills, heavy metals, pesticides, and other contaminants from soil and water. Microorganisms metabolize the pollutants and convert them into harmless end products like carbon dioxide and water. For instance, *Pseudomonas putida* is a genetically modified bacterium used to degrade toluene and naphthalene in contaminated soils.

Another significant application is wastewater treatment through biological means. Activated sludge processes, trickling filters, and biofilm reactors are examples of biological wastewater treatment technologies. These methods use microbial communities to break down organic pollutants in wastewater. The development of genetically engineered microbes (GEMs) with enhanced metabolic capacities has improved the efficiency of these processes. For instance, GEMs can be used to degrade chlorinated compounds that naturally occurring microbes cannot process _________ _____ _____ ________ ____ ______ _____.
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