Guilt-free world tours come at a high cost to comfort, according to one eco-travel agency. ResponsibleTravel.com has mapped out an 80-day trip to see some of the world's largest expanses of land and sea via trains and cargo ships - a greener, more carbon-footprint-minimizing mode of transportation compared to air travel. While the pricey itinerary [...] The post 'Responsible' no-fly world tour features trains, cargo ships appeared first on News Brig.