Access to clean, fresh water is vital for all humans, but in many parts of the world, getting water is not as simple as turning on the tap. Contaminated water, especially in impoverished areas, kills millions of people a year, while warming oceans, Arctic melt, and disappearing rainforests are a threat to the environment. This book shows how humans use water and how we can help preserve it in the wake of these threats. Statistics and fact boxes help readers understand various issues related to water, from drought and flooding to desalination and pollution.