Yemen faces an abundance of complex and interrelated social, economic, and environmental problems. Yemen's many challenges are compounded by the country's addiction to qat. Large parts of Yemen’s society and economy are organized around the consumption and production of this stimulant. Qat consists of the tender leaves and shoots of the tree catha edulis, which contain the amphetamine cathinone. Qat must be consumed soon after being harvested because the cathinone begins breaking down after 24 hours. When chewed, qat brings about a state of mild euphoria in the user, often followed by insomnia. Qat is considered a Class 1 drug...