This story is part of Choosing Earth, a series that chronicles the impact of climate change and explores what's being done about the problem.A Scottish startup says its prototype wave-energy device produced "highly encouraging results."AWS Ocean announced that after six months at sea its Archimedes Waveswing produced more than 10 kilowatts during moderate wave conditions, with peaks as high as 80 kilowatts.Waveswing is a 50-ton buoylike device that's tethered to the ocean floor and sits below the water's surface.This trial period, taking place off Scotland's Orkney Islands, is expected to wrap up before the end of the year, with more trials planned in 2023."