Estonia
It ranks highest due to its greenery, freshwater sources, clean air and water.
Luxembourg
It scores high on sanitation, drinking water quality, and waste water treatment.
Germany
This is mostly due to high water and air quality.
Finland
It has excellent air quality, water quality, and top class education system.
United Kingdom
Due to its stringent environmental regulations.
Sweden
It has some of the best quality water and air on the planet.
Norway
Norway is one of the most beautiful countries in the world, and without a doubt, it is one of the cleanest countries in the world.
Austria
It is full of greenery, excellent drinking water facilities, and the strictest standards for air pollution and waste management.
Switzerland
It scores high on sanitation and drinking water quality standards. It also has abundant wildlife and greenery.
Denmark
Denmark has the strictest standards for reducing greenhouse gas emissions and preventing climate change.