From what I recall aliens come to earth and gets the people addicted some kind of "drug" making everyone passive. Other details I remember are the Aliens live off of methane gas so everything smells like sulfur. I think the main character, a human ends up starting a fire at the end in order the blow up the methane and destroy everything. Some of these details may be off, I read this so long ago.
Here's a long shot. A novel rather than short story.
Nightmare Blue by Gardner Dozois and George Alec Effinger
Nightmare Blue: the most addictive drug in the universe. The alien race known as the Aensalords alone know from whence it comes, and are its sole purveyors. Already its effects are visible on Earth—in the stark, raving eyes of the hopelessly addicted and enslaved. Now two agents set out to find the source: Jaeger, the last private detective in the peaceful world of the future, and Corcail Sendijen, a lobster-like alien once a servant of the Aensalords themselves. But Earth alone is not all that is at stake—for it seems humans are merely test subjects, and the Aensalords have plans that could endanger the entire galaxy.
A couple of sample chapters at Baen Books.