What do you understand by hazardous waste? What are the characteristics of hazardous wastes?

### Understanding Hazardous Waste  

Hazardous waste is a category of solid waste that poses substantial or potential threats to public health and the environment due to its chemical, physical, or biological properties. These wastes are generated from industrial, medical, agricultural, and domestic activities, often containing toxic, corrosive, reactive, or flammable substances that require specialized disposal and treatment methods. Regulatory frameworks at the national and international levels define hazardous waste and outline proper handling, transportation, treatment, and disposal protocols to minimize risks.

Hazardous waste management is crucial because improper disposal can lead to severe environmental contamination, groundwater pollution, air pollution, and health hazards. Various regulatory bodies, such as the Environmental Protection Agency (EPA) in the United States, the Central Pollution Control Board (CPCB) in India, and international agreements like the Basel Convention, provide guidelines for managing hazardous waste responsibly.

### Characteristics of Hazardous Waste  

Hazardous wastes are classified based on their inherent properties, which make them dangerous to human health and the environment. The U.S. Resource Conservation and Recovery Act (RCRA) and similar global regulations identify four primary characteristics of hazardous waste:  

#### 1. Ignitability  
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