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29.0 x 21.6 cm ⏐ 11.4 x 8.5 in (300dpi)
QA INTERNATIONAL / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY QA INTERNATIONAL / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
The sterilization of its soil is the result of a half century of intensive agriculture. Traditionally, the periodic monsoon rains ensured wild vegetation in the region, and this protected the land from the Sun's heat and returned humidity to the atmosphere, thus contributing to the water cycle. In cultivated fields, on the other hand, solar rays are absorbed directly by the soil, causing it to dry out.
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