Accessibility is Important
The Web Content Accessibility Guidelines (WCAG) 2.0 state:
"line spacing is at least space-and-a-half within paragraphs."
To be AAA compliant, paragraph line-height should be set to 1.5.
This page contains information I gathered and thought were very useful. See more notes on programming.
Just to let you know, this page was last updated Thursday, Jan 18 18