Modern waste-management systems are integrating a variety of recycling processes. Transforming waste into energy and waste into new products is at the forefront of new technologies. For example, light is used to separate glass from minerals, while magnets and whirlstreams separate metals from non-metals. Inside the eponymous rotting boxes', organic waste is recycled by organic materialeating micro-organisms into re-usable products. Understanding the...

It's Halloween and Peg and Cat have a big problem! Someone has left the park full of trash and the costume parade might be canceled. Don't freak out, Peg and Cat save the day by sorting and recycling. Then, they discover they've been trick-or-treating with a real, live tiger!