1 Yes
2 Yes. We should lie tho ^_^ Who would want to visit a planet which is being killed slowly day by day by its inhabitants.
3 Someone's gotta discover something, and maybe by finding extra-terrestrail life this planet can finally come together as one.
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.