They say we should all be responsible for our rubbish and understand why it is hurtful to the environment and animals.
Over 69,000 animals were treated for injuries caused by rubbish last year.
Cash and trash
There is five times more litter than there was in the 1960s and it costs about £332m a year to clear it all up, experts say.
They also reckon trash like cans or orange peel can still be hanging around 100 years later because it doesn't rot away.
To get the message across, there will be a National No Litter Day on 24 June when kids will be asked to pick up the rubbish in their school grounds.