Dirty Tunisia

Well despite there being litter bins on the beach many of the Tuinisians are litter louts!
This morning while walking along the shore on the beach at La Marsa,a couple casually threw away the plastic wrapping from their plastic bottles onto the beach,they simply didn't care at all.Much of the beach in La Marsa is often littered with plastic bottles and bags etc.
I don't understand how Tunisians can be so unconcerned about the environment.