The UK has come fourteenth in an international league table ranking national environmental performance.
It received a score of 86.3 out of 100 and was ranked according to sanitation, greenhouse gas emissions, agricultural policies, air pollution and 20 other measures to formulate an overall score.
The UK was behind fellow G8 nations Germany (13), Canada (12) and France (10) but ahead of the Japan (21), Italy (24) Russia (28) and the US (39).
The US came 39th among 149 countries on the Environmental Performance Index, conducted by researchers at Yale and Columbia universities.
Top ten countries, with scores of 87 or better, were European nations Switzerland, Sweden, Norway and Finland.
The other nations in the top echelons were Austria, France, Latvia, Costa Rica, Colombia and New Zealand.
Daniel Esty, report author and director of the Yale Centre for Environmental Law and Policy, said: "Switzerland is the most greenhouse gas efficient economy in the developed world. "
India, China and Australia ranked among the bottom 25 nations in terms of total climate change scores.
New Zealand and Japan were the most environmentally friendly nations in the Asia-Pacific region.
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