This is not the worst story by Clarke, but there are many that are decidedly better.
Story summary (spoiler).
An accident during the commissioning of a nuclear power plant in Australia creates a zero-gravity field of a limited range right on the surface of earth - a sphere of some size that goes both into atmosphere & inside earth. And has fantastic properties.
Title of the story has to do with our normal notion of up: moving towards zero gravity.
What Goes Up, short story, review
Author: Arthur C Clarke
First published: 1955
- "The Sentinel": Observable behavior of the shield protecting alien planted beacon on moon is very similar to the human created zero gravity field in this story.
- "Technical Error": Another story where an accident during commissioning of a familiar machine opens up fantastic & fearsome new vistas.