John Grant's "Buzz off" (flash fiction, first contact, humor, free)

A fleet of elder alien race of "Sgrin'th" has arrived on earth, hoping to help the aborigines grow out of their "cultural infantilization" & to help fix the ruined climate.

But on contact, humans are extraordinarily hostile. Aliens are baffled, but perhaps you as a human can figure out the reason for hostility...

Fact sheet.

First published: Nature, 20 June 2013.
Download full text from publisher's site.
Rating: A.