The answer is Photosynthesis. Remember the chlorophyll absorbs light energy from the sun to make glucose using the process PHOTOSYNTHESIS.
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<span>Their progress and wealth is highly dependent on the harvests, and
the price of grain. They probably have to import some industrial
products and if they had a bad year (weather, other catastrophies, poor
technology) they can't get the necessary amount of industrial products
in exchange for their surplus e. g. in grain. </span>
Lake Burton is a 2,775 acre (11.23 km²) reservoir with 62 miles (100 km) of shoreline located in the northeastern corner of Georgia in Rabun County
Water vapor is also the most important greenhouse gas in the atmosphere. Heat radiated from Earth's surface is absorbed by water vapor molecules in the lower atmosphere. ... Some of the heat returns to the Earth's surface. Thus, water vapor is a second source of warmth (in addition to sunlight) at the Earth's surface.