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在世界许多地方,安全的饮用水显得十分珍贵,许多地方甚至根本就无法得到清洁的饮用水保障。即便是在一些拥有清洁水源的地区,生活废水和工业废水对水源的污染也日趋严重。加拿大是世界上淡水资源最丰富的国度之一,其与美国共有的北美五大湖地区是世界上最大的淡水湖群,淡水储量占地球淡水总储量的20%。但就是在淡水资源如此丰富的加拿大,保持水资源清洁问题仍然是社会所关注问题之一。人们不会忘
In many parts of the world, safe drinking water is very precious and in many places there is simply no access to clean drinking water at all. Even in areas with clean water sources, domestic and industrial waste water pollution is becoming more serious. Canada is one of the richest countries in the world in terms of freshwater resources. Its North American Great Lakes region, which is shared with the United States, is the largest freshwater lake in the world with freshwater reserves accounting for 20% of the total global freshwater reserves. But just as Canada is so rich in freshwater resources, maintaining water cleanliness remains one of the concerns of the community. People will not forget