What is ecology-and how can you help save the planet? Do you know how many litres of water are wasted if a tap drips for one day? Which gases make up the earth's atmosphere? Is nuclear power good or bad? Ecology looks at the relationship between living things and the environment. This book shows why we should take care of our environment-and how understanding ecology can help save the earth. This series has been published in 12 languages including several outside Europe. The translation is relevant to the southern hemisphere and will be suitable for use in New Zealand schools