We have to be real and speak the truth (even if that's alarming)
"everybody" is not going to even try (much) to mitigate climate change. In fact, in many examples, quite the opposite.
Of course, this may be culture-specific. I live in the United Kingdom (I assume the psychology of people in Europe, the USA, China, etc are generally the same). The following is a normal response (behavior or attitude) from the "person on the street"
.Me "The data shows that greenhouse gases keep on rising, we have to try and live in ways that burn fewer fuels". https://ourworldindata.org/greenhouse-gas-emissions
The following is a summary of the average (most common) UK adult's response (after, quite often, apparently agreeing that, to paraphrase "something has to be done about it")
They then plan, for example, their holidays abroad on passenger planes, Crusie ships, you name it. In other words, even though they are aware that burning fuels is emitting greenhouse gas emissions - their priorities align with activities that are relatively emitting high amounts of greenhouse gases. You could say, for various reasons that they will not be truthful about, they don't care because they believe that climate change won't badly affect them personally (i.e., greed and selfishness)
Of course, some people do, for example, choose to take a holiday in the UK and use trains and bicycles. But, many adults are evidently not thinking of ways (activities), either work or recreation, that reduce their greenhouse gas emissions.
Of course, there is also the greenwashing from industries. For example, airline industries promote the disinformation that their Jet fuel is more "environmentally friendly" (All jet fuel will always be the opposite of "friendly" for ecology. It's pollution [period].
Therefore, what's it going to take to change their behaviors?