Our Partner Flockeo has developed a set of indicators for climate & sustainability-related conditions drawn from the UN Human Development Index and publicly available satellite data. After taking all the indicators into consideration, which consist of Human Development Index, GDP Share of Tourism and Environmental Performance Rank, Flockeo ranks 155 countries on how high they rank overall environmentally. You will find these indicators for the destinations we feature on our website, based on which destinations are ranked. You might like to take these into consideration when you are planning your next trip.