Give them some kind of incentive to recycle. Up to thirty percent of all your recycling is wasted as it is just put in with normal trash. Recycling is expensive. So the trash companies often just put it all back in with the trash anyway.
Easy just show them what it would be like without recycling show them pictures of the forest before and after loggers come in and cut them down and other stuff like that.
Usually by separating their waste into different categories: food and other organic litter, paper and carton, plastic and cans... and throwing them away grouped together and not all mixed up into the...