The Burnable Garbage Day

An abandoned planet neglected by humankind become a mountain of garbage.
On this planet, by chance, a robot wakes up.

Programmed as a cleaning robot,
he begins to clean up the trash in front of him.

Just one robot was going to clean this mountain of garbage's planet...

By the way, that day was the burning garbage day...

Broken buildings, piles of debris and garbage...
What on earth happened on this planet?