efe-epaBy Cristina Yuste Madrid

The amount of oxygen in the world's oceans decreased by 2 percent between 1960 and 2010 and is expected to go down by a further 3-4 percent by the year 2100 as a result of global warming, something that will have an effect on habitats and the coastal economies that depend on them.

This situation was outlined in a report by the International Union for Conservation of Nature (IUCN) - "Ocean deoxygenation: Everyone's problem" - presented Saturday at the United Nations climate change summit in Madrid. EFE-EPA