They both mean the same thing. The first is simply a portmanteau, or shorter version — just as a micro-cleanup is a scaled-down form of a regular cleanup.

Everyone is a Trash Athlete — or a Trashlete! If trash cleanups were an Olympic sport, anyone could make it on their national team, as long as they start training early, just like you do. Keep going!

You're now ready to take your Trash Athletness out and about some more! Have fun restoring the health of our palnet, and inspire others, too!