Carbon dioxide (CO2) emissions, resulting from the combustion of fossil fuels by human activity, reinforce the greenhouse effect and cause climate disruption. While public awareness of this global problem is growing, ocean acidification, described as "the other CO2 problem", is still largely unknown. This book answers ten key questions on the biogeochemical foundations of acidification, past, current and future trends, the impact on marine organisms and on humans, and finally, ways to remedy the situation. It draws its answers from fields as diverse as biogeochemistry, ecology, physiology, evolution, aquaculture and fisheries, economics and sociology.