Fly-tipping is a huge problem in the UK.
It's when people dump rubbish from their homes in random places like parks or near roads.
It can be anything from fridges, to mattresses to washing machines, and it costs the local councils millions of pounds every year to tidy up.
Fly-tipping is illegal and councils can fine people a lot of money for leaving their rubbish in a public place.
We sent Jenny on a 'rubbish' safari in Irvine in Scotland, to find out more about how fly-tipping can affect the environment...