20 Aug '11, 1pm

One more reason to reduce greenhouse gases - they could attract unwanted attention from aliens, NASA scientists suggest

WASHINGTON - It is not the most compelling reason to curb greenhouse gases, but reducing our emissions might just save humanity from a pre-emptive alien attack, scientists claim. In their report, Would Contact with Extraterrestrials (ET) Benefit or Harm Humanity? A Scenario Analysis, scientists said aliens might view changes in Earth's atmosphere as symptomatic of a civilisation growing out of control - and take drastic action to keep us from becoming a more serious threat. This highly speculative scenario is one of several described by scientists at National Aeronautics and Space Administration (NASA) and Pennsylvania State University that, while considered unlikely, they say could play out if humans and alien life were to make contact in the future. Dr Shawn Domagal-Goldman of NASA's Planetary Science Division and his colleagues compiled a list of plausible outcomes that...

Full article: http://www.todayonline.com/Science/EDC110820-0000189/Alie...

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