Passage (Questions 96-100)Rainwater harvesting, once a common practice in Indian villages, is returning to the cities. Roof-top systems col…

Passage (Questions 96-100)
Rainwater harvesting, once a common practice in Indian villages, is returning to the cities. Roof-top systems collect rain that would otherwise run into drains and store it in tanks or let it percolate underground, raising the water table. Although the initial cost is modest, many households ignore the idea, believing that the municipal supply will always remain adequate. Experts warn that this belief is dangerously optimistic: groundwater levels in several metropolitan areas have fallen by many metres in a decade. They urge that harvesting be made compulsory for new buildings, with penalties for non-compliance, rather than left to goodwill alone.

The author's attitude towards the belief that the municipal supply will always remain adequate is