Why do you think most of the water on Earth cannot be used for drinking or farming?
Most of the water on Earth is found in oceans, which is salty and not suitable for drinking or farming.
The chapter explains that although most of the Earth's surface is covered with water, the majority of it is salty, leaving only a small amount of freshwater available. If all the water on Earth were in a glass, the freshwater would only be as much as in a teaspoon.
Freshwater is essential for drinking, growing crops, and daily activities.
Explanation
The chapter states on Page 3-4 that although most of the Earth's surface is covered with water, the majority of it is salty, leaving less amount of freshwater. The comparison given is that if all water were in a glass, freshwater would only be as much as in a teaspoon.
Solution Steps
Most water on Earth is found in oceans, which is salty and unsuitable for drinking or farming
Although most of Earth's surface is covered with water, the majority is salty
Only a small amount of freshwater is available for human use
If all water were in a glass, freshwater would only equal a teaspoon