Complex sentence: Red Hulk was created through a combination of gamma radiation and cosmic rays, and the satellites used to revert the Hulk to human form at the end of "World War Hulk" were used to power the device used to turn Ross into the Red Hulk.
Split into simpler sentences: Red Hulk was created through a combination of gamma radiation and cosmic rays. The satellites used to revert the Hulk to human form at the end of "World War Hulk" were used to power the device used to turn Ross into the Red Hulk.