A piss poor frame since it suggests that the average Joe or Jane on the street commands the SAME capacity to engender change as the CEO of Exxon or Bank of America.
Since memes like this pretend there's a level playing field where none exists, I'll refresh your memory on this VITAL fact:
"This corresponds precisely with the 2014 landmark study done by Professors Martin Gilens (Princeton) and Benjamin Page (Northwestern). They reviewed 1,779 congressional bills and found that the average citizen had “near zero” influence over policy. The only bills that passed where those that coincided with the wishes of the wealthy and corporate interests."
WHEN The People have AGENCY they act.
Thousands showed up for the Paris COP21 talks.
Thousands marched in New York in an effort to move the elites' agenda on climate chaos/change.
Thousands have gathered to oppose fracking, oppose oil deep sea drilling operations, to get universities to divest from fossil fuels; and LOTS of Indigenous Peoples have done their utmost to protect sacred lands.
A glib deceptive comment like yours renders ALL of these efforts null and void as if all people don't care... when the issue is that of POWER and who controls investment decisions of major magnitude.
The MILLIONS who support Sanders support him because he's the only candidate working to disable the corporations' grip over all aspects of U.S. foreign and domestic policy. He GETS IT about climate change/global warming and would do much to offset it.
As you know, Sanders is being knee-capped by Establishment Politics and the machinery put in place to protect Status Quo interests.
You could make the case that those who support Trump or Cruz have ZERO understanding of climate change; but that demographic hardly speaks for all.
Sanders' supporters likely do know about, and want to see change implemented from the top-down that would lessen the human energy footprint and give Earth a chance to recover.
The same mechanisms in place to thwart Sanders are also in place to thwart a massive transition away from fossil fuels.
Again, the problem is that of POWER.
Your frame is the ONE SIZE FITS ALL favored forum meme: When you can't make a real argument, JUST "blame the people."