"Green Arrow helps to open Green Lantern's eyes to the modern-day problems in America, when he shows him the plight of the people living in the tenements of slumlord Jubal Slade. When the Guardians of the Universe observe GL roughing up Slade, they summon him to Oa where he is reprimanded. But against their orders GL returns to Earth and helps the district attorney collect enough evidence to put Slade away. Angry at his insubordination, the Guardians contact Green Lantern, but Green Arrow argues that there are serious problems across America that have previously escaped the attention of Green Lantern. The Guardians confer, and decide to send a representative to accompany Green Lantern and Green Arrow as they go on a journey of discovery." Quote taken from http://dc.wikia.com/wiki/Green_Lantern_Vol_2_76
