The dump is meant to handle transuranic wastes, or man-made elements that remain radioactive for thousands of years.
I continued to make my two columns: act of nature, or failure of man-made element.
Wildfires can occur due to natural or man-made elements.
Throughout his career Adams has varied the proportions of man-made and natural elements in his pictures.
Many were contaminated with plutonium, a radioactive man-made element, which is extremely dangerous when it lodges in tissue.
The first man-made element was Technetium, in 1937.
We must collect and destroy the world's supply of this man-made element named after the devil himself.
The exceptional touristic potential of the town includes both natural and man-made elements.
Fuel Plutonium, a man-made element; or uranium, in which the form most suitable for bombs, uranium-235, has been purified.
Plutonium is a man-made element used in most nuclear bombs and in some research projects.