Disposal of Radioactive Wastes in Clay-Rich Sediments of the Deep

Disposal of radioactive wastes in clay-rich sediments of the deep sea floor

A) Is presently banned by international treaty.
B) Is not seriously under consideration because of the danger of water pollution.
C) Would provide some containment of radioisotopes even in the event of leakage of wastes from canisters.
D) Would be impractical because of the instability of the sea floor.