Commissioned by Carolina Ethanol Partnership

I have a friend who has started a business recently, with the above title. You can check it out here. Right now they are investigating growing kelp in the ocean near Charleston, SC to produce ethanol from it.
Two things that CEP wanted to show were a curtain/fence device that would keep the kelp from floating out to sea, and a sonic repellent device to drive marine life away from the kelp during harvest time so no animals are harmed.

The floating/anchored fence:




The sonic repellent:




Process: Sketched, penned by hand, then scanned in and handled in Adobe Photoshop and Illustrator.