The two organizations 'paired up' to educate the public about the threat of global warming.
I can't do everything at once—I've only got 'one pair of hands'. [=I am only one person]
To avoid competition, breeding/mating 'pairs' stay away from other male chimpanzees.
(..) With you and that new dress. Now, Mammy, darling. No use to try to sweet-talk me, Miss Scarlett. I's knowed you since I put the first pair of diapers on you. I said I's goin' to Atlanta with you, and goin' I is. Kings and traes, huh? Too good for me, Major! Pity we couldn't have fought the war out (..)1939 Gone with the Wind
(..) -Have you seen Dr. Meade? -One side, lady, please. Dr. Meade! Dr. Meade! At last! Oh, thank heavens you're here. I need every pair of hands. Come, child! Wake up! We've got work to do. But Melly's having her baby. You've got to come with me! Are you crazy? (..)1939 Gone with the Wind