The U.S economy produce 20% of the world's output
Decomposer and scavengers
Uranium because it is a <span>fuel that is assembled in such a way that a controlled fission chain reaction can be used. The heat created by splitting the U-235 atoms is then </span>used<span> to make steam which spins a turbine to drive a generator, producing electricity.</span>
He accomplished several things such as leading an expedition to explore the strait of megallan.