id	keyword
essd-759	water
essd-759	research
essd-759	scarcity
essd-759	environmental
essd-759	development
essd-759	freshwater
essd-759	world
essd-759	water scarcity
essd-759	literature
essd-759	science
essd-759	nations
essd-759	united
essd-759	water research
essd-759	problem
essd-759	schema