Here is the full list of all 14 Hello Pollution! achievements.
Scarecrow.
Secret of the Gnome revealed.
Money burned.
Burned 10 bags of money.
Bone Grinder.
You have found soda.
Acid Burns.
Christina's secret has been revealed.
First sentence.
Burned 5 flowers.
Burned 50 bags of trash.
Bunny is not feeling well.
You have broken more than 20 toxic barrels.
Poked the bunny more than 20 times.