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Submission + - The country that is running entirely on renewable energy (independent.co.uk) 1

An anonymous reader writes: Costa Rica has achieved a clean energy milestone by using 100 per cent renewable energy for a record 75 days in a row.

The feat was achieved thanks to heavy rainfall, which powered four hydroelectric plants in the first three months of the year, the state-run Costa Rican Electricity Institute said.

No fossil fuels have been burnt to generate electricity since December 2014, in the state which is renowned for its clean energy policies.

Submission + - Rosetta Spacecraft Makes Nitrogen Discovery on Comet

An anonymous reader writes: A peculiar mix of molecular nitrogen on the comet target of Europe's Rosetta spacecraft may offer clues to the conditions that gave birth to the entire solar system. Molecular nitrogen was one of the key ingredients of the young solar system. Its detection in Comet 67P/Churyumov–Gerasimenko, which Rosetta is currently orbiting, suggests that the comet formed under low-temperature conditions (a requirement to keeping nitrogen as ice), according to officials with the European Space Agency.

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