21.   Suppose scientists could engineer drought-resistant crops so that farmers in arid regions of the world could grow corn in the midst of desert conditions.

22.   The other is the common collared lizard, which inhabits arid regions of the American West, ranging from California to southern Colorado.

23.   Trucks carrying wood for funeral pyres streamed into Bhuj district, in the heart of the Kutch, an arid region with a dearth of trees.

24.   Halaib is an arid region bordering the Red Sea largely populated by Sudanese nomads.

25.   Halaib is an arid region bordering the Red Sea that is largely populated by Sudanese nomads.

26.   So the campaign will at first only target the arid northern region considered more prone to the disease.

27.   The government says the dam will generate hydroelectric power and provide much-needed irrigation and drinking water in the arid region.

28.   The two leaders also discussed terrorism and water sharing, which promises to be a pressing issue in the arid region.

29.   There the group hired camels and a local guide and headed for the arid Danakil region, but by then their Ethiopian visas had expired.

30.   Water supplies, which are scarce in the arid region, have been singled out as strategic targets.