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(a) Radioactive wastes are the wastes that contain radioactive material. it is generated when nuclear energy is used  for generating electricity or other purposes. radioactive wastes are extremely dangerous as they radiation given off from them causes mutations at a very high rate. Safe disposal of radioactive wastes is another major problem. 

(b) Defunct ships and e-wastes. Defunct ships are a kind of solid waste requiring proper disposal. Such ships are broken down in developing countries for scrap metal. They often contain toxic substances such as asbestos, polychlorinated biphenyls, tributyltin, lead and mercury.

E-waste are irreparable computers and electronic goods . Most of them are shipped to developing countries for metals like copper, nickel, silicon, gold, that are recovered by recycling. E-wastes are buried and incinerated.

(c) Municipal Solid Wastes. Municipal solid wastes are wastes generated  from homes, offices, stores, schools, etc. and they are collected and disposed by the municipality. The municipal solid wastes generally comprise paper, food wastes, glass, metals, rubber, leather, textile, etc. Burning reduces the volume of the wastes, although it is generally not complete and open dumps often serve as the breeding ground for rats and flies.