From the 'X-Files' Dept: NASA's Alien Contact Scenario

From the 'X-Files' Dept: NASA's Alien Contact Scenario: "Extraterrestrial beings monitoring Earth  might  view changes in our atmosphere as symptomatic of a a self-destructing civilization and take drastic action to keep us from becoming a more serious threat, according to a highly speculative scenario developed last year by scientists at NASA and Penn State University."