Many of us are concerned about environmental issues and try to incorporate a `green' approach into our day-to-day lives. However, there is usually much more we can easily do if only if we give it enough thought. Here McCarthy explains how to carry out an environmental audit of your life in areas such as waste disposal, gardening and home maintenance, food, work and travel to find out how `green' you are. He then offers 500 ingenious yet practical suggestions you can follow to improve your score.