Alien World Watch

I've come from far to save your world,

The green multi-eyed alien said,

We've watched you well for centuries,

When this one ends you'll all be dead;

Your atmosphere is poison full,

Your oceans are polluted too,

All your stars will vanish from sight,

Your skies no longer will be blue;

You have to take more drastic steps,

To change your very careless ways,

And don't take years to do all that,

Think more in terms of months and days;

This warning is for just one time,

Because I won't be back again,

If you don't do just what I say,

All your regrets will be in vain.