Greening the Deserts of Qatar
Photo: Jon Miller/Homelands Productions
A small desert country, Qatar imports more than 90 percent of its food and desalinates 99 percent of its water. Researchers are trying out new techniques to grow food, such as pumping carbon dioxide into greenhouses and using drip irrigation in sandy plant beds.
Read more: Coaxing Food From One of the World's Driest Places
Here, sellers display imported vegetables at the wholesale market in Doha.