We're The Last Humans Left

We’re the last humans left,
There’s no point in denial.
Face it.
We’re scared, we don’t want to die.
But, think of all the species we murdered. For decoration.
So, we try to flee, the planet we ruined.
We’re like a disease through a body, slowly polluting it.
But, we need the body to support us.
We worry that aliens will infiltrate the Earth,
But why would they want our sickly planet?
Shouldn’t they worry that we’ll take theirs?
Look at what we did to our own species. What we’re still doing.
What would we do to any E.T's?
It’s too horrid to think.
We’re the last humans left,
And I’m scared for them.