Final answer:
Burial should be the last resort when disposing of radioactive material due to potential environmental harm. Other methods include landfill, incineration, and recycling, which are preferable. Sawdust from lumber production can be used to generate electricity as a form of waste recycling.
Step-by-step explanation:
The disposal option that should be considered as a last resort is burial. Disposing of radioactive material in this way has the most potential to harm the environment and should be the last alternative considered after options like recycling, returning to the manufacturer, and transferring to an authorized user.
Other common methods of waste disposal include landfill and incineration, and recycling can help alleviate the volume of waste that requires disposal. For example, burning sawdust from lumber production to generate electricity utilizes municipal solid waste in a productive manner which is a responsible use of resources. It's important to handle materials contaminated with radioactive particles with care according to special regulations to prevent harmful contact with the environment.