Earth science – Page 10
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News
Fertiliser use increases atmospheric N2O levels
Over the past 50 years fertiliser use has contributed to the rise in atmospheric nitrous oxide levels
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Feature
High hopes for shale
Shale gas has given the US petrochemicals industry a much needed boost – will it do the same for the rest of the world?
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Feature
Treasures from the deep
Mining companies are exploring underwater volcanic vents, hoping to extract metals such as gold and copper. Victoria Gill looks at the technical, environmental and political hurdles
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News
Bacteria ruled the world billions of years ago in purple oceans
Evidence backing a controversial sulfur-rich model of the Earth's oceans 1.8 billion years ago has been uncovered in molecular fossils.