Question

Penelope sees that her brother Angelos is using water carelessly. She warns Angelos to be more careful because water is a renewable resource and can be used up since it takes millions of years to form. Angelos argues that water is a nonrenewable resource and cannot be used up since it can be replaced when it rains.

Which statement is correct in this scenario?

Penelope was correct when she said that water takes millions of years to form.
Penelope was correct when she said that water can be used up.
Angelos was correct when he said that water is a nonrenewable resource.
Angelos was correct when he said that water cannot be used up.

Answer 1

Penelope was correct when she said that water can be used up (in practice).

Explanation in brief:
- On Earth the total amount of water is largely conserved and cycles through evaporation, precipitation, runoff and infiltration, so water is a renewable resource in a broad sense.
- However, usable freshwater (accessible surface water and groundwater) can be depleted or contaminated faster than it is replenished. Some groundwater (so‑called fossil water) recharges very slowly — over thousands to millions of years — so drawing it down can be effectively “using it up” for human timescales.
- Thus Penelope’s blanket claim that “water takes millions of years to form” is not generally true (much water cycles rapidly), and Angelos’s statements that water is nonrenewable or “cannot be used up” are both misleading.