Trees stand around a Tolou Keur garden in Walalde department of Podor, in the Great Green Wall of the Sahara and the Sahel area, Senegal, July 11, 2021. Gardens known as Tolou Keur hold plants and trees resistant to hot, dry climates, and are planted with circular beds that allow roots to grow inwards, trapping liquids and bacteria and improving water retention and composting. Picture taken with a drone. REUTERS/Zohra Bensemra SEARCH "BENSEMRA REFORESTATION" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES