What is water harvesting? List two main advantages associated with water harvesting
at the community level. Write two causes for the failure of sustained availability of
groundwater.

Explanation

### Step-by-Step Solution

**Step 1: Define Water Harvesting**
Water harvesting is the process of collecting and storing rainwater for reuse before it reaches the ground. This technique is often referred to as rainwater harvesting, and it involves capturing rainwater from surfaces such as rooftops, pavements, or other impermeable surfaces.

**Step 2: List Two Advantages of Water Harvesting at the Community Level**
1. **Improvement of Groundwater Levels**: Water harvesting helps recharge groundwater aquifers, leading to an increase in the levels of underground water. This is crucial for maintaining a sustainable water supply for communities.

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