it drives the hydrologic cycle * Condensation of water vapor is the principal source of heating the atmosphere (even more than direct heating by solar radiation).
(it; drives; the hydrologic cycle) (it drives the hydrologic cycle; is; the principal source of heating the atmosphere (even more than direct heating by solar radiation)
it it drives the hydrologic cycle
drives is
the hydrologic cycle
the principal source of heating the atmosphere (even more than direct heating by solar radiation