Toxic waste is made from the bi-product of construction, manufacture and farming waste to name a few. Toxic waste is harmful to the environment and possibly to humans.

Yes, toxic waste is classed as toxic (dangerous to the environment).

What toxic waste? Some toxic waste gives off radiation, some doesn't

Toxic waste can be released from a great many different things. Toxic waste can be released from factories for example.

Toxic waste can be helpful in a very few special situations. Toxic waste can be used to kill unwanted organisms.