For his first few days at sea on the MS Porrima, Gunter Pauli was stunned by the silence aboard his solar-powered ship.
원문출처 : https://www.cnn.com/style/article/ms-porrima-shipping-sustainability-scn/index.html
원문출처 : https://www.cnn.com/style/article/ms-porrima-shipping-sustainability-scn/index.html