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.