How do I change line spacing in titles ? (see screen grabs)

Hi

I'm having problems with the way the titles are displaying in both PC and Mobile views.
The font is fine, but the line spacing causes the lines to clash (see attached images).
I suspect this is a CSS issue, but not sure whether to alter the EasyBlog CSS or Template CSS.
I have used Chrome's inspect facility, but it's not clear where to go to fix this.
Can you please point me in the right direction.

Many thanks, David