Complex sentence: Browning and Ballard return to their apartment where Duffy is waiting for them, who explains that by cloning world leaders they can ensure that laws are not passed which are harmful to Delos' interests.
Split into simpler sentences: Browning and Ballard return to their apartment where Duffy is waiting for them. He explains that by cloning world leaders they can ensure that laws are not passed which are harmful to Delos' interests.