availability of water on earth
DESCRIPTION
Where is the Earth's water? How much of it is salt water and how much is fresh?TRANSCRIPT
Availability of WaterAvailability of Water on Earth on Earth
How much do we have?
Global Water•About 70% of the earth is covered in water.•The total amount of water in the world is approximately 1.4 billion km3, of which 97.5% is saltwater and 2.5% is fresh water.•Of the 35 million km3 of freshwater on earth, about 24.4 million km3 are locked up in the form of glacial ice, permafrost, or permanent snow. Groundwater and soil moisture account for 10.7 million km3. Freshwater lakes and marshlands hold about 0.1 million km3. Rivers, the most visible form of fresh water account for 0.002 million km3 or about less than 0.01% of all forms of fresh water.
Distribution of Earth’s WaterDistribution of Earth’s Water
WHERE IN THE WORLD IS MOST OF THE WATER?
IN THE OCEAN
WHERE IN THE WORLD IS MOST OF THE FRESHWATER?
FLOATING FROZEN IN THE OCEAN AS ICEBERGS ANDGLACIERS
HOW MUCH WATER IS AVAILABLE FRESHWATER (WATER WE CAN ACTUALLY GET TO)?
AVAILABLE WATER IS NOT EVENLY DISTRIBUTED AROUND THE PLANET AND NEITHER ARE THE PEOPLE.
SEEING INTO THE FUTURE: A GLOBAL PERSPECTIVE