An (not very) epic pome

One for the comp

Hello, Marvin, this is Earth,
Of intelligence here,
There is a dearth.
Some say here that CO2
Will warm the place
And land us in the poo.

We have guys here
called politicians
Who everyone has learned to fear
They lie and cheat and defraud
They are all a horrible crew
They talk until we all get bored

So if I were you I would
Turn your spaceship round
If  by any chance you could
Unblock your venturi
Fire your rockets and
Go back to Alpha Centauri!