The average temperature of the Earth is increasing day by day. Ice bergs in North and South Pole of the earth are melting at a fast pace. Most of the countries around the world have now taken this as a major issue and started taking steps to reduce emissions of carbon dioxide in the atmosphere. But there are few countries which are way ahead in this campaign. Let us see some of these Green Countries. Scientists at Yale University ranked these countries based on the stoballnoy (Russian Word) scale which is used to evaluate the emission of Co2.