Whenever you purchase any electronics, cooking appliances or toys, the chances are that these items will come in packages made of cardboard. Along with plastic, cardboard is one of the materials that businesses the world over use for packaging their products. However, unlike plastic, cardboard is generally biodegradable. As such, you might think that recycling cardboard is considerably easier in Adelaide and other cities. But, it is worth mentioning here that not all types of cardboard are recyclable. For instance, cardboards that feature a wax coating or certain chemically-treated cardboards can be hard to recycle.