Even before the revolution, Yemen's water situation had been described as increasingly dire by experts who worried that Yemen would be the first country to run out of water. Agriculture in Yemen takes up about 90% of water in Yemen even though it only generates 6% of GDP. A large portion of Yemenis are dependent on small-scale subsistence agriculture. Half of the agricultural water in Yemen is used to grow khat, a drug that many Yemenis chew.