Conduit of Energy
Plants serve as the conduit of energy into the biosphere, provide food and materials used by humans, and they [blank] our environment. According to Ehrhardt and Frommer, the three major challenges facing humanity in our time are food, energy, and environmental [blank] . All three are plant-related. All of our food is produced by plants, either directly or indirectly via animals that eat them. Plants are a [blank] of energy production. And they are intimately involved in climate change and a major factor in a variety of environmental concerns, including agricultural expansion and its impact on habitat destruction and waterway pollution.
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