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Climate, biodiversity and disease ecology

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Which most directly adds geological carbon to the active atmosphere?

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Which makes an energy comparison fairest?

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Which is a climate positive feedback?

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Which is primarily a physical coastal-protection mechanism?

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Which explains how flooding can reduce crop growth?

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Which Aedes stages are aquatic in the normal life cycle?

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Which observation most directly indicates local transmission rather than importation alone?

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Question 1 of 6

Compare an energy claim

A claim calls bioethanol zero-carbon and hydropower emission-free. Evaluate both using life-cycle reasoning and name a fair comparison unit.

Include land use, production and site effects.

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