Which resource can be used for electricity, vehicle fuel, and heat?
a. wind
b. biomass<...
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Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant
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Why are scientists concerned about the depletion of the ozone levels in the stratosphere?
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What substance acts to prevent sudden ph changes in bodily fluids?
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