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在全球变暖的大背景下,缺水已成为越来越多的国家面临的严峻挑战,美国也不例外。美国西部的干旱始于上世纪90年代末,干旱的状况日益严重。如今,这些州已不再把希望寄托在老天爷
In the context of global warming, water shortages have become a serious challenge to more and more countries. The United States is no exception. Drought in the western United States began in the late 1990s with a growing drought. Now, these states no longer pin their hopes on God