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ܓܓنجات آب های کشاورزیܓܓ - آلودگی آب شرب و اهمیت تصفیه آب

..::صرفه جویی در بخش کشاورزی تنها راه حل رهایی از بحران آب::..
تاریخ:سه شنبه 15 فروردین 1391-06:56 ب.ظ

آلودگی آب شرب و اهمیت تصفیه آب

آلودگی آب شرب و اهمیت تصفیه آب

آب بیش از سه‌چهارم سطح کره زمین را پوشانده‌است. ۹۷٫۲ درصد از آب‌های موجود در این سیاره در اقیانوس‌ ها و دریا ها انباشته شده‌اند، لیکن تنها حدود ۸/۲ درصد از آب‌های موجود قابل شرب می‌باشد. مقدار قابل توجهی از کل آب‌های سطح کره زمین به‌صورت مناطق قطبی، یخچال‌های طبیعی، رطوبت هوا و خاک می‌باشد که عملاً غیرقابل دسترسی است و تنها ۰٫۶۲ درصد از آن در رودخانه‌ها جاری بوده و یا به‌صورت دریاچه‌های آب شیرین و منابع زیرزمینی قرار گرفته‌اند و انسان‌ها آب آشامیدنی خود را از این منابع تأمین می‌نمایند.

 عکس   آب

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