淡水の重要性 What is freshwater?
Freshwater is water low in dissolved salts.
Why is it important?
All living humans, animals and plants are made of water it is required for life to survive.
How much freshwater is on the earth?
The earth 75% of the world is covered with water of all the water only 1% is freshwater.
Where is freshwater located?
Freshwater is found on every continent in the world.
Where does freshwater come from?
Freshwater comes from the atmosphere as mist, rain and snow.
Freshwater recycles itself by evaporation.
PROBLEMS FACING FRESHWATER ON THE EARTH
1 Climate change the freshwater melts into to oceans it becomes too salty to use for life.
2 It is limited there is only so much freshwater.
3 Pollution freshwater gets polluted very easily by many sources.
4 Population growth more freshwater is needed to sustain life.
5 Agriculture with more people on earth more growing more food uses high amounts of freshwater to grow.
6 With higher water use the habitats for get smaller many forms of life can no longer survive.
7 Overuse depletes the groundwater supplies.
8 Dams change to ecosystems affecting fish and aquatic animals.
9 Toxic waste destroys life and kills animals.
10 Waste water from municipal sewage and livestock operations pollute and change the ecosystems.