Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 5 · column 1 of 6 · from the scan, no model involved
Greenhouse gases (GHGs),
especially carbon dioxide (C02) and methane, determine Earth’s temperature, and science has linked rising atmospheric concentrations to human activity. How might this affect the global climate?
Sunlight strikes the planet most directly at the equator. The greater heat accumulating there flows toward the poles in ocean currents. The Gulf Stream warms nearby land, especially Europe. Temperature differentials establish air currents. Heat stimulates evaporation of sea water, falling later as rain. Modified by terrain, these phenomena determine weather Dattems
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