Multiple wells for one water supply source are termed wellfields, which may withdraw water from confined or unconfined aquifers.

However, the lead-acid batteries require recharging which may produce carbon dioxide, depending on the energy supply source.

It gave consumers the option of a 100% renewable electricity supply sourced from wind, solar and small hydroelectric schemes.

In most cases it takes time to switch these supply sources.

The ceramic pipe (30 cm in diameter) plumbing seen running down from the niches of the tower into the well was meant as a supply source.