Ever heard of the Global Green Economy Index? This index measures 130 countries on leadership & climate change, efficiency sectors, markets & investment and the environment to establish which countries around the world are doing their best to be sustainable. So when you're choosing where to visit, consider supporting countries that have a demonstrated commitment to sustainability. (Trust us, you won't be disappointed.) Some countries include: Sweden, Switzerland, Iceland, Norway, Costa Rica & Finland. Let's get those passports ready.