What is the viral One Tree For Every Pet Picture trend all about?

This trend started doing the rounds on Instagram after an online campaign was launched with the aim of planting one tree for every pet picture posted by netizens.

If you have been on Instagram lately, you probably have come across several pet pictures. You must be wondering what is new about that? Well, this influx of cute and cuddly pet pictures was initiated for a cause. Not that we are complaining!

WHAT IS THE ONE TREE FOR EVERY PET PICTURE TREND?