Independent - The 12 most read are those environment articles published in 2011 that have been visited by the greatest number of separate users to date.
The list (click the headlines to read articles in full)
1. Global warning: climate sceptics are winning the battle
Father of the green movement, James Hansen of Nasa, says scientists lack PR skills to make public listen. Dr Hansen believes "a gap has opened between what is understood about global warming by the relevant scientific community, and what's known by the people who need to know – and that's the public."
2. Oceans on brink of catastrophe
3. YouTube sensation fuelling trade in an endangered species
4. Japan uses tsunami victims' cash to shield whalers from activists
5. Letters to a heretic: An email conversation with climate change sceptic Professor Freeman Dyson
6. Giant ozone hole found above Arctic
7. Why build-up of fresh water in Arctic could spell trouble for Britain
8. The plastic found in a single turtle's stomach
9. Exclusive: BP to risk worst ever oil spill in Shetlands drilling
10. Victory in the campaign to ban circus animals
11. Ex-climate sceptic now backs global warming
12. The secret life of animals
Editor's choice
Michael McCarthy, Environment Editor, The Independent