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Percent of our oxygen that comes from the ocean

rise in Earth’s average surface temperature during the past 100 years

Evaporation of water from the leaves of a plant

water, in liquid or solid form, that falls from the atmosphere

cold period, lasting hundreds to millions of years, during which glaciers cover much of Earth

a gas in the atmosphere that absorbs Earth’s outgoing infrared radiation

warm period that occurs during an ice age

A measure of cloudiness of water