Dealing with Dirt: Science of Cleaning - Tapa dura

Reseña del editor

This takes a closer look at what dirt is made of and how soap, washing powders and other chemicals help us to clean up the dirt on ourselves, our clothes and around the home. It also discusses the effects of these chemicals on our environment and the importance of bacteria and other micro-organisms which destroy biological dirt. Lesley Newson has also written "Feeling Awful" and "Meatballs and Molecules".