document.write('Atlantis astronauts begin second spacewalk
')
document.write('Space station alarm delays Atlantis crew spacewalk
')
document.write('Italy FM warns leaders ahead of climate summit: reports
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document.write('Central America demands billions in climate damages
')
document.write('Astronaut counts down to daughter's birth
')
document.write('Amazon countries to hold climate talks
')
document.write('US, Canada seek warmer ties on Arctic
')
document.write('Permafrost thaw threatens Russia oil and gas complex: study
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document.write('UN chief to visit Trinidad for climate talks
')
document.write('El Nino intensifies Latin America drought
')