“
It looked like every cartoon of a flying saucer Newt had ever seen.
As he stared over the top of his map, a door in the saucer slid aside with a satisfying whoosh, revealing a gleaming walkway which extended automatically down to the road. Brilliant blue light shone out, outlining three alien shapes. They walked down the ramp. At least, two of them walked. The one that looked like a pepper pot just skidded down it, and fell over at the bottom.
The other two ignored its frantic beeping and walked over to the car quite slowly, in the worldwide approved manner of policemen already compiling the charge sheet it their heads. The tallest one, a yellow toad dressed in kitchen foil, rapped on Newt's window. He wound it down. The thing was wearing the kind of mirror-finished sunglasses that Newt always thought of as Cool Hand Luke shades.
'Morning, sir or madam or neuter,' the thing said. 'This your planet, is it?'
The other alien, which was stubby and green, had wandered off into the woods by the side of the road. Out of the corner of his eye Newt saw it kick a tree, and then run a leaf through some complicated gadget on its belt. It didn't look very pleased.
'Well, yes. I suppose so.' he said.
The toad stared thoughtfully at the skyline.
'Had it long, have we, sir?' it said.
'Er. Not personally. I mean, as a species, about half a million years. I think.'
The alien exchanged glances with its colleague. 'Been letting the old acid rain build up, haven't we, sir?' it said. 'Been letting ourselves go a bit with the old hydrocarbons, perhaps?'
'I'm sorry.'
'Could you tell me your planet's albedo, sir?' said the the toad, still staring levelly at the horizon as though it was doing something interesting.
'Er. No.'
'Well, I'm sorry to have to tell you, sir, that your polar ice caps are below regulation size for a planet of this category, sir.'
'Oh, dear,' said Newt. He was wondering who he could tell about this, and realizing that there was absolutely no one who would believe him. [...]
The small alien walked past the car.
'CO2 level up 0.5 percent,' it rasped, giving him a meaningful look. 'You do know you could find yourself charged with being a dominant species while under the influence of impulse-driven consumerism, don't you?
”
”
Terry Pratchett (Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch)