How concepts are communicated matters a great deal, because one of the primary obstacles is simply lack of awareness and education about the graveness of the threat facing humanity. We have decades worth of very good physical evidence that hasn't changed much yet on its own. Disinformation tactics have been very effective so far. I'm sure people will start paying attention more when the northern ice cap goes away (though since we live in an age where flat earth theories are gaining followers, it's easy to dismiss anything as fake for some conspiracy nuts). However, waiting at all for more dramatic physical manifestations is far too long. There are also many solid plans being worked on that simply need money and support. So again, what matters is how the concepts are conveyed to the lay public. Politicians are not going to fix this until they're afraid of losing elections over it. And even then it's more likely that they'll make token gestures such as declaring emergencies without making any real, drastic changes.