Irrigation

To cool livestock

To help grow crops and maintain landscapes (correct)

To dispose of sewage

To suppress weed growth

To support mining operations

To protect crops from frost

To increase soil consolidation (correct)

To reduce dust

Around 2,500 years

Around 1,000 years

Over 5,000 years (correct)

Over 10,000 years

<p>Surface irrigation</p> Signup and view all the answers

<p>Drainage</p> Signup and view all the answers