Front

What is the water that collects in spaces and soil underground?

Back

Groundwater

Front

What are widespread pollution problems known as?

Back

Non-point source

Front

Where is 2/3 of freshwater on Earth 'locked away'?

Back

Ice and glaciers

Front

What does desalination refer to?

Back

The removal of salt from ocean water.

Front

Which irrigation method offers the greatest conservation of water?

Back

Drip irrigation.

Front

What is the term for the process of water moving from the ground to the atmosphere?

Back

Evaporation.

Front

What is the main source of freshwater for human consumption?

Back

Rivers and lakes.

Front

What is the term for the gradual destruction of the earth's surface due to water flow?

Back

Erosion.

Front

What is the process of collecting rainwater for reuse called?

Back

Rainwater harvesting.

Front

What is the term for the introduction of harmful substances into the environment?

Back

Pollution.