Read the passage and choose the best answer:
Clean freshwater resources are essential for drinking, bathing, cooking, irrigation, industry, and for plant and animal (36)_______. Unfortunately, the global supply of freshwater is (37)_______ unevenly. Chronic water shortages (38)_______ in most of Africa and drought is common over much of the globe. The (39)_______ of most freshwater supplies - groundwater (water located below the soil surface), reservoirs, and rivers - are under severe and (40)_______ environmental stress because of overuse, water pollution, and ecosystem degradation. Over 95 percent of urban sewage in (41)_______ countries is (42)_______ untreated into surface waters such as rivers and harbors.
About 65 percent of the global freshwater supply is used in (43)_______ and 25 percent is used in industry. Freshwater (44)_______ therefore requires a reduction in wasteful practices like (45)_______. irrigation, reforms in agriculture and industry, and strict pollution controls worldwide.
Trả lời câu hỏi dưới đây:
______(39)