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Prof Callum Roberts "Do you want those ports or do you want the Great Barrier Reef to continue being great? Because you can't have both."
RT @David_Ritter: Callum Roberts on Australian attitudes to coal mining...
RT @SavageNatPelle: Callum Roberts: Supertrawlers don't spread their catch, they concentrate it. It's the economics. #oceans #goodriddancemargiris
#SydneySiders! You're invited to a talk by world-leading #marine scientist Callum Roberts, 18 Mar #GBR
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