1.   However, the waste remains at the site while the company waits for approval to have it shipped to the United States or Europe for retreatment.

2.   The waste will remain highly radioactive for thousands of years.

3.   Untreated human waste remains the biggest pollution threat.

4.   The reprocessing of nuclear waste allows the separation of plutonium and uranium, which could be used again in power plants, although the useless waste remains radioactive.

5.   Plastic waste in landfills remains preserved forever.

6.   Shell claims seabed disposal is the best option because the toxic waste would remain localized and not pose an environmental hazard.