Groundwater is underground, that means we can’t see it. You won’t be able to see it like a river, a lake, a lagoon or the sea, but it is in motion.
Of all the freshwater that exists on Earth, a large amount is groundwater.
Much of this groundwater —also called an aquifer— lies between country borders, so it is known as a transboundary aquifer.
Countries that share groundwater must agree to manage and care for it.
There are almost 600 transboundary aquifers worldwide.