a-minute
Explanation
The Joke
A street canvasser asks a passerby, "Do you have a moment for the environment?" The passerby's response -- "Anyone? Anyone? Please, at least make eye contact" -- reveals that absolutely nobody is stopping. The final panel pulls back to show a dinosaur-like alien creature addressing what appears to be a small dinosaur, saying that this species "appears to have evolved an auditory form of camouflage" -- implying that humans have literally evolved the ability to become invisible to environmental canvassers.
The Humor
The joke works on multiple levels. First, it captures the universally relatable experience of desperately avoiding eye contact with clipboard-wielding activists on the street. Second, it elevates this mundane social behavior to the level of evolutionary biology by having alien scientists observe and classify it as a form of "auditory camouflage." The implication is that humans are so good at ignoring pleas to care about the environment that it looks like a evolved survival mechanism -- which is both funny and a pointed commentary on humanity's collective ability to tune out environmental concerns.