About this book; what is ecology?; the environment; ecosystems; the ocean; cycles in nature; disturbing the cycles; adaptation; coniferous and deciduous forests; relationships in nature; population and conservation; urban ecosystems; tropical rainforests; change in nature; evolution; people and planet; energy and the environment; the future; ecology projects - building an ant observatory, making a pond, building a compost heap, sprouting beans and seeds, building a bird table, birdwatching, planting trees, making recycled paper, a windowsill salad garden, organizing your own group; going further.