Last month, a solar-powered trailer set off on a four-year journey that will cross six continents and 90 countries -- all in a bid to stop global warming.
원문출처 : https://www.cnn.com/travel/article/solarbutterfly-trailer-climate-scn-c2e-hnk-spc-intl/index.html
원문출처 : https://www.cnn.com/travel/article/solarbutterfly-trailer-climate-scn-c2e-hnk-spc-intl/index.html