Australia is now beginning to explore tidal power through a number of pilot projects. Among those harnessing this tidal potential is Sydney-based Mako Energy, which makes underwater turbines ranging between two and four meters in diameter. One turbine operating in constantly flowing water can produce enough electricity to power up to 20 homes. Their design enables them to generate electricity even in slow-flowing water, meaning they could be used in rivers and irrigation canals as well as the ocean. Unlike more expensive turbines being built in South Korea the Australian variety only costs between $20,000 to $70,000, depending on the power output and the location. "We're developing turbines at a scale where they can be deployed easily in remote communities, coastal businesses, island communities and resorts," Douglas Hunt, Mako Energy MD, told CNN Business. Reducing costs means turbines could be accessible to everyone from coal-fired power plants looking to add green energy to their operation, to off-grid coastal communities." Being the world's largest island.. this is a no brainer.