Does climate really change? It is a book which explains the climate change in 8 chapters. Chapter 1 discusses the concept ofclimate. Chapter 2 discusses the regulation of Earth's temperature. 3rd chapter estudies climate changes along the Earth. Chapter 4 explains the causes of these natural climate changes that have been generated in Earth's history. Chapter 5 estudies the climate change due to fossil fuel use. 6 deals about climate change on terrestrial ecosystems. Chapter 7 estudies climate change on ocean ecosystems. Finally, chapter 7 deals about the relationships of climate change with the economy and society.