I would love to have something in the fourth place here, but in terms of constant, clean, scalable energy, [solar] and wind and the other renewables aren't there yet because they're inconstant.
本当はここに4つ目があると良いが 太陽光　風力　などは 安定面や衛生面 拡張性において おぼつかないためまだ該当しない