Which is earths largest source of drinkable water

The Ocean

Explanation:

The Ocean is what makes up most of the water on Earth which makes it the largest source of water you can find. As long as you make the Ocean/Sea water drinkable (by treating/helping to remove dirt, salt and other harmful components) then you should be fine.

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.