Sonali went to Naples - a city with a BIG rubbish problem. She met kids whose school had to be closed, because of rotting trash outside the building.
Nine-year-old Sarah said: "We couldn't come into school for a few days when there was rubbish outside our school. Underneath all the bin bags there are mice now."
"On my way to school, I have to walk through piles of rubbish - it stinks. When I go home, I can't play in the park because there are piles there too," said eight-year-old Frenci.
"The smell is disgusting - it's really getting to everyone," said nine-year-old Matteo.
Irene, nine, said: "It's really serious and people are worried about germs spreading. I'd like to see a proper recycling system introduced as a solution."