CRITICAL THINKING ACTIVITY: THE METHANE CYCLE
natural sources or about 2-20 Tg per year. Microbes in the guts of termites produce methane as part of their normal digestive process, and the amount generated varies among different species. The emissions contributed by termites depend largely on the population of these insects, which varies significantly in different regions.
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PROBLEM SOLVING ACTIVITY: HOW DO EARTH’S SPHERES …
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The Lithosphere--contains all of the cold, hard solid land ...
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TEACHER BACKGROUND: NATURAL CLIMATE CHANGE
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