How many people is too many? What happens when too many people are crowded into too little space? What can be done to control the world's population? Read this book to learn more about overpopulation and start thinking about what can and should be done to address this important issue.
Should scientists manipulate genes to create new varieties of food? Is genetically modified food safe to eat? How can we grow enough food to feed all the world's people? Read this book to find out more about genetically modified foods and what people around the world think about them.
What is a pandemic? What diseases are likely to cause a pandemic? How can the spread of a disease be stopped? Find out about how a disease reaches pandemic proportions and start thinking about what people can do to stop the spread of deadly diseases.
Is human activity causing Earth's to heat up? Is global warming just a natural event? What are the possible effects of global warming? Read this book to learn more about the global warming debate and to start forming your own opinions.
What causes pollution? How does pollution affect the environment? Why should we care about pollution? Read this book to find out more about the social, environmental, and economic issues related to pollution and what you can do about it.
What is a watershed? Why are watersheds important? What is it like to live where there is no clean, safe water supply? Read this book to find out more about the importance of watersheds and how you can help in the fight to keep Earth's freshwater sources clean and safe.
How do you measure poverty? What are the effects of poverty? What can we do to prevent poverty? Learn about poverty and its many faces around the world and to start thinking about what you can do about this global social problem.