CLEAN : Toilet to tap gains appeal in drought parched California

The video discusses the importance of water supplies that are independent of the hydrologic cycle, ensuring availability regardless of rainfall. It explains the reverse osmosis process, which removes salt from water, and highlights the need to add some salt back for taste. The video also emphasizes that water molecules on Earth have existed for 4.5 billion years, having been part of various life forms. The process results in water quality comparable to or better than bottled water.

Why are water supplies independent of the hydrologic cycle considered important?

• They require no treatment.

• They are unaffected by rainfall.

• They are easier to distribute.

• They are cheaper to maintain.

What is a key step in the reverse osmosis process mentioned in the video?

• Boiling the water.

• Adding sugar to the water.

• Removing all minerals from the water.

• Adding a little salt back into the water.

What additional substances are added to the water after reverse osmosis?

• Salt and pepper

• Lime and chlorine

• Baking soda and lemon

• Sugar and vinegar

How old are the water molecules on Earth according to the video?

• 2 billion years

• 3.5 billion years

• 4.5 billion years

• 5 billion years

What is the quality of the treated water compared to?

• Tap water

• River water

• Rainwater

• Bottled water