Strictly speaking, marine debris is not waste classification item, but due to highly polemized nature, it is only fitting to discuss it separately. Marine debris, a.k.a. ocean debris or marine litter, is defined as any persistent solid material that is manufactured or processed and directly or indirectly, intentionally or unintentionally, disposed of or abandoned into rivers, lakes, seas or oceans.

Landfill gas (LFG) is a natural by product of the decomposition of organic material in landfills. LFG is composed of roughly 50% methane (the primary component of natural gas), 50% carbon dioxide (CO2) and a small amount of non-methane organic compounds. Methane is a potent greenhouse gas 28 to 36 times more effective than CO2 at trapping heat in the atmosphere over a 100-year period. Municip...

Bio-medical waste means any solid of liquid waste, including its container, which is generated during the diagnosis, treatment or immunization of human beings or animals or in research activities pertaining thereto or in the production or testing of biological matter. Waste generated by healthcare activities includes a broad range of materials, from used needles and syringes to soiled dressings, body parts, diagnostic samples, blood, chemicals, pharmaceuticals, medical devices, paper towels, wip...

A simple definition of hazardous waste is waste that can cause harm to human and the environment. Wastes are classified as hazardous if they exhibit any of four primary characteristics based on physical or chemical properties of toxicity, reactivity, ignitability and corrosively. Toxic wastes are those that are poisonous in small or trace amounts. Some may have acute or immediate effect on human or animals. Carcinogenic or mutagenic substances, such as pesticides and heavy metals, c...