A huge study has been underway to find prime locations for underwater turbines, which are powered by the tides - something known as Tidal Stream Energy. As it turns out, the Cook Strait might be the perfect place, and researchers estimate that Aotearoa could produce up to 93 percent of the electricity it currently using methods like underwater turbines. To give us his reaction, Craig Stevens, Professor of Physics at the University of Auckland chats to Jesse.