Post by spunkymonkey on Aug 19, 2011 9:15:41 GMT
When the aliens notice and launch a pre-emptive strike 
www.guardian.co.uk/science/2011/aug/18/aliens-destroy-humanity-protect-civilisations?CMP=twt_gu
And, before anyone comments that it's from the Grauniad, note that this scenario has been raised in a peer reviewed paper from Penn State University and NASA
"A preemptive strike would be particularly likely in the early phases of our expansion because a civilisation may become increasingly difficult to destroy as it continues to expand. Humanity may just now be entering the period in which its rapid civilisational expansion could be detected by an ETI because our expansion is changing the composition of the Earth's atmosphere, via greenhouse gas emissions," the report states.
"Green" aliens might object to the environmental damage humans have caused on Earth and wipe us out to save the planet. "These scenarios give us reason to limit our growth and reduce our impact on global ecosystems. It would be particularly important for us to limit our emissions of greenhouse gases, since atmospheric composition can be observed from other planets," the authors write.
"Green" aliens might object to the environmental damage humans have caused on Earth and wipe us out to save the planet. "These scenarios give us reason to limit our growth and reduce our impact on global ecosystems. It would be particularly important for us to limit our emissions of greenhouse gases, since atmospheric composition can be observed from other planets," the authors write.
www.guardian.co.uk/science/2011/aug/18/aliens-destroy-humanity-protect-civilisations?CMP=twt_gu
And, before anyone comments that it's from the Grauniad, note that this scenario has been raised in a peer reviewed paper from Penn State University and NASA
