TIME: Is Yemen Chewing Itself to Death?

By 4 in the afternoon, most men walking the streets of Sana'a are high, or about to get high — not on any sort of manufactured narcotics, but on khat, a shrub whose young leaves contain a compound with effects similar to those of amphetamines. Khat is popular in many countries of the Arabian peninsula and the Horn of Africa, but in Yemen it's a full-blown national addiction. As much as 90% of men and 1 in 4 women in Yemen are estimated to chew the leaves, storing a wad in one cheek as the khat slowly breaks down into the saliva and enters the bloodstream. The newcomer to Yemen's ancient capital can't miss the spectacle of almost an entire adult population presenting cheeks bulging with cud, leaving behind green confetti of discarded leaves and branches...

But khat's detractors say the leaf is destroying Yemen. At around $5 for a bag (the amount typically consumed by a single regular user in a day) it's an expensive habit in a country where about 45% of the population lives below the poverty line. (Most families spend more money on khat than on food, according to government figures.) A khat-addled public is more inclined to complacency about the failings of the government, khat ceremonies reinforce the exclusion of women from power and, as is obvious to anyone finding a government office nearly empty on a weekday morning, khat is keeping the country awake well past its bedtime.

Thanks jim!