Sentence:  For most of the past three decades, the natural world was treated almost as an afterthought by world leaders. If discussed at all, it was with <WSD>platitudes</WSD> about the need to save polar bears and tigers. 
Meaning of the word marked with <WSD> tags:  An often-quoted saying that is supposed to be meaningful but has become unoriginal or hackneyed through overuse; a cliché.