Twenty percent of all fresh surface water is in Lake Baikal in Asia.
Explanation:
Studies on Lake Baikal, located <em>south of Russian Siberia,</em> showed that if the entire world population only drank water from this lake, they could live 40 years without any problem of scarcity. This is<u> the oldest </u>lake that is known and considered drinkable thanks to the cleaning carried out by the microorganisms that inhabit it. Its waters are a paradise for <em>fauna and flora </em>and are also <u>used for different medical purposes.</u>
