Have you tried the line-height command for the respective CSS?
I don't use the text descriptions but it should be something like
	
	
	
		Code:
	
	
		.node .nodeText {
line-height: 1.75;
}
	 
 Maybe that will work.
.node .nodeDescription
will only do it for the node description (in place of the .nodeText - which does it for all the text if my test was right).