Biodiversity

Cod, haddock and other fish traditionally eaten in the UK are on the decline, but warm-water fish are thriving, study claims

Oil giant confirms leak has been closed ahead of launch of government investigation

James Murray asks why it took the oil giant over two days to publicly announce the worst North Sea oil spill in a decade

The final amount leaked could be four times the volume that has spewed into the sea in the past week

Senior executive admits "hundreds of tonnes of oil" could be trapped in pipeline, as company rejects criticism over lack of transparency

Oil spills are tragic, but they are also inevitable

Campaigners step up calls for moratorium on new deepwater drilling licences as Shell provides update on worst UK spill in a decade

The economic downturn means organic farmers are less likely to reap rewards of premium prices for their produce