And you 'd still need to get air in the tank in a green way . Maybe a solar-powered , geothermal , wind-driven compressor ?
而且吧，要把空气压到罐子里也得很环保，要不试试太阳能的，地热的，风能的空气压缩机？
Iceland 's ambassador to japan , stefan stefansson , says his country 's experience suggests japan does not need subsidies to develop geothermal energy .
