With each swift slice of his machete, Salo Arnold, 62, adds to Haiti's deforestation. A former farmer, Arnold says he must harvest the trees for charcoal production to support his wife, 10 children and eight grandchildren. In a week he can earn about $12 U.S. for 5 to 6 bags of charcoal, far more than he could gain from harvesting a traditional crop like sweet potatoes. Studies differ, but most agree that less than 10 percent of the country's tree cover remains. So much is gone that in many places like Northwest Haiti, men like Arnold have resorted to cutting down shrubs and saplings, having exhausted nature's supply of large trees long ago.