A farmer walks along terraces growing qat, a mild stimulant, during a local campaign aimed at uprooting qat and replacing it with coffee and almond plants in Haraz mountains, around 100km (62 miles) west of the Yemeni capital Sanaa January 3, 2013. Qat dominates life in Yemen, where most men spend half the day chewing it, even at work, and experts say it is ravaging Yemen's frail economy and sucking up precious water. REUTERS/Khaled Abdullah (YEMEN - Tags: SOCIETY AGRICULTURE ENVIRONMENT)